阅读说明：本技术 眼科镜片 (Ophthalmic lens ) 是由 井口由纪 松冈祥平 向山浩行 于 2020-06-18 设计创作，主要内容包括：提供了一种眼科镜片及其相关技术,所述眼科镜片被配置为利用笔形束的单色像差提供抑制近视发展的效果,所述笔形束是穿过眼科镜片并穿过瞳孔的光线束,所述眼科镜片包括波长滤波器,所述波长滤波器用于使比设定的主波长更长的长波长光衰减。(An ophthalmic lens configured to provide an effect of suppressing the progression of myopia using monochromatic aberration of a pencil beam, which is a light beam passing through the ophthalmic lens and passing through a pupil, includes a wavelength filter for attenuating a long wavelength light longer than a set dominant wavelength, and a related art thereof.)

1. An ophthalmic lens configured to provide an effect of inhibiting the progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a beam of rays passing through the ophthalmic lens and through a pupil,

the ophthalmic lens includes a wavelength filter for attenuating longer long wavelength light than a set dominant wavelength.

2. The ophthalmic lens of claim 1, comprising:

a predetermined position AP; and a base portion BP as a portion adjacent to the predetermined position AP,

wherein the light is focused on the retina and the light is focused at a position outside the retina due to the predetermined position AP and the base BP.

3. The ophthalmic lens according to claim 2, wherein the predetermined position AP satisfies at least one of the following conditions (1), (2) and (3):

(1) the predetermined position AP comprises a convex region protruding from a base BP of at least one of an eyeball-side surface and an object-side surface of the ophthalmic lens to focus a part of the pencil beam on an afocal side with respect to the retina;

(2) the predetermined position AP includes a refractive structure on at least one of the eyeball side surface and the object side surface of the ophthalmic lens to focus a part of the pencil beam on the through-focus side with respect to the retina by a refractive action of the predetermined position AP;

(3) The predetermined position AP is provided on at least one of the eyeball-side surface and the object-side surface of the ophthalmic lens, and includes a different-refractive-index material region having a refractive index different from that of the base BP to focus a part of the pencil beam on the through-focus side with respect to the retina by an interaction of the predetermined position AP and the base BP.

4. The ophthalmic lens of claim 2 or 3,

high-order monochromatic aberrations of four or higher orders are added to the pencil beam passing through a range of 4mm in diameter, the range including the predetermined position AP and the base BP.

5. The ophthalmic lens of claim 3,

the wavelength filter is disposed on at least one of the protrusion region, the refractive structure, and the different-refractive-index material region.

6. The ophthalmic lens according to any one of claims 1 to 5, wherein the set dominant wavelength is a value in the range of 500 to 585 nm.

7. The ophthalmic lens of any one of claims 1 to 6, wherein the set dominant wavelength is a value in a range of 532nm to 575 nm.

8. The ophthalmic lens according to any one of claims 1 to 7, wherein the wavelength filter is a value in the wavelength range of 564nm to 570 nm.

9. An ophthalmic lens configured to provide an effect of suppressing progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a light beam passing through the ophthalmic lens and passing through a pupil, the ophthalmic lens having a spectral transmittance setting such that an average value of a defocus amount (diopter) x a light amount focused on an under-focus side with respect to a retina is smaller than an average value of a defocus amount (diopter) x a light amount focused on an over-focus side with respect to the retina.

10. An ophthalmic lens configured to provide an effect of suppressing progression of hyperopia using monochromatic aberration of a pencil beam, which is a bundle of rays passing through the ophthalmic lens and through a pupil,

the ophthalmic lens includes a wavelength filter for attenuating short wavelength light shorter than a set dominant wavelength.

11. The ophthalmic lens according to any one of claims 1 to 10, wherein the ophthalmic lens is a spectacle lens.

Technical Field

The present disclosure relates to an ophthalmic lens.

Background

With the increase of myopia people, the number of severe myopia people is also increased. It is well known that severe myopia can lead to decreased vision. Thus, the increase of severe myopia becomes a serious social problem, and there is a wide demand for a therapeutic method for inhibiting the progression of myopia.

Several methods have been proposed for inhibiting the progression of myopia to severe myopia. One method of inhibiting the development of optical myopia is by using ophthalmic lenses such as spectacles or contact lenses (soft contact lenses, orthokeratology).

Reference list

Patent document

US 2017/131567a is an example of the prior art.

Disclosure of Invention

A first aspect of the disclosure is:

an ophthalmic lens configured to provide an effect of inhibiting the progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a beam of rays passing through the ophthalmic lens and through a pupil,

The ophthalmic lens includes a wavelength filter for attenuating longer long wavelength light than a set dominant wavelength.

A second aspect of the present disclosure is one aspect according to the first aspect, including:

a predetermined position AP; and a base portion BP as a portion adjacent to the predetermined position AP,

wherein the light is focused on the retina and the light is focused at a position outside the retina due to the predetermined position AP and the base BP.

A third aspect of the present disclosure is the one according to the second aspect, wherein the predetermined location AP satisfies at least one of the following conditions (1), (2), and (3):

(1) the predetermined position AP comprises a convex region protruding from a base BP of at least one of an eyeball-side surface and an object-side surface of the ophthalmic lens to focus a part of the pencil beam on an afocal side with respect to the retina;

(2) the predetermined position AP includes a refractive structure on at least one of the eyeball side surface and the object side surface of the ophthalmic lens to focus a part of the pencil beam on the through-focus side with respect to the retina by a refractive action of the predetermined position AP;

(3) The predetermined position AP is disposed on at least one of the eyeball-side surface and the object-side surface of the ophthalmic lens, and includes a different-refractive-index material region having a refractive index different from that of the base BP to focus a part of the pencil beam on the through-focus side with respect to the retina using an interaction (reciprocal action) of the predetermined position AP and the base BP.

A fourth aspect of the present disclosure is the aspect according to the second or third aspect, wherein,

high-order monochromatic aberrations of four or higher orders are added to the pencil beam passing through a range of 4mm in diameter, the range including the predetermined position AP and the base BP.

A fifth aspect of the present disclosure is the aspect according to the third aspect, wherein,

the wavelength filter is disposed on at least one of the protrusion region, the refractive structure, and the different-refractive-index material region.

A sixth aspect of the present disclosure is the aspect according to any one of the first to fifth aspects, wherein,

the set dominant wavelength is a value in the range of 500nm to 585 nm.

A seventh aspect of the present disclosure is the aspect according to any one of the first to sixth aspects, wherein,

The set dominant wavelength is a value in the range of 532nm to 575 nm.

An eighth aspect of the present disclosure is the aspect according to any one of the first to seventh aspects, wherein,

the wavelength filter is a value in the wavelength range of 564nm to 570 nm.

A ninth aspect of the present disclosure is;

an ophthalmic lens configured to provide an effect of suppressing progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a light beam passing through the ophthalmic lens and passing through a pupil, the ophthalmic lens having a spectral transmittance setting such that an average value of a defocus amount (diopter) x a light amount focused on an under-focus side with respect to a retina is smaller than an average value of a defocus amount (diopter) x a light amount focused on an over-focus side with respect to the retina.

A tenth aspect of the present disclosure is:

an ophthalmic lens configured to provide an effect of suppressing progression of hyperopia using monochromatic aberration of a pencil beam, which is a bundle of rays passing through the ophthalmic lens and through a pupil,

the ophthalmic lens includes a wavelength filter for attenuating short wavelength light shorter than a set dominant wavelength.

An eleventh aspect of the present disclosure is the aspect according to any one of the first to tenth aspects, wherein,

The ophthalmic lens is a spectacle lens.

Drawings

Fig. 1A is a schematic front view of the eyeglass lens in a case where the predetermined position AP is a convex portion area and the convex portion area is not provided in the center.

Fig. 1B is a schematic front view of the eyeglass lens in a case where the predetermined position AP is a convex area and the convex area is also provided at the center.

Fig. 1C is a schematic front view of the eyeglass lens in a case where only one predetermined position AP is set.

Fig. 1D is a schematic front view of the eyeglass lens in a case where the predetermined position AP is provided in the form of a ring.

Fig. 2 is a sectional view showing an example of the configuration of the eyeglass lens shown in fig. 1B.

Fig. 3 is a schematic sectional view (1) showing an optical path through the eyeglass lens shown in fig. 1B.

Fig. 4 is a schematic sectional view (2) showing an optical path through the eyeglass lens shown in fig. 1B.

Fig. 5 shows a schematic front view and a partially enlarged view of an eyeglass lens including a modified example of a Cr film provided with holes in the form of a dot pattern.

Detailed Description

US 2017/131567a discloses an eyeglass lens that exerts an effect of suppressing the development of refractive error such as myopia (hereinafter also referred to as "effect of suppressing the development of myopia") by adding monochromatic aberration described later. Such spectacle lenses are also known as myopia progression inhibiting lenses. Specifically, for example, spherical minute protrusions having a diameter of about 1mm are formed on a convex surface which is an object-side surface of the eyeglass lens.

With the eyeglass lens, generally, light entering from the object side surface is emitted from the eyeball side surface and thus focused on the retina of the wearer (in the present specification, predetermined position B). That is, the light rays are focused on the retina by a portion of the spectacle lens according to US2017/131567a, which has a shape corresponding to a prescribed intensity. Position B is referred to as focal position B.

On the other hand, with respect to light passing through a minute convex portion on the eyeglass lens according to US2017/131567a, light rays incident on the ophthalmic lens are focused at a plurality of positions a on the through-focus side in the optical axis direction with respect to the predetermined position B. Position a is referred to as focal position a. The above monochromatic aberration provided by the minute convex portions is used to suppress the progression of myopia.

In this specification, "over focus side" refers to a direction moving toward an object to be observed in an optical axis direction with reference to the retina, and "under focus side" refers to a direction opposite to the over focus side and a moving direction away from the object to be observed in the optical axis direction with reference to the retina. If the light intensity is too large, the light is condensed on the over-focus side, and if the light intensity is insufficient, the light is condensed on the under-focus side.

In an optical system of the eye (cornea, lens, etc.), the refractive index differs depending on the wavelength of light. Therefore, defocusing on the retina occurs at each wavelength due to longitudinal chromatic aberration. Defocusing at each wavelength means that a pencil beam, which is a bundle of rays passing through the pupil, is relatively focused at short wavelengths in front of the retina and at long wavelengths in back of the retina. (in this disclosure, the term "pupil" is an optical term meaning "the entrance pupil of the eye.) this phenomenon may contribute to the development of myopia or contribute to inhibiting the development of myopia. In particular, a component of light focused on an under-focus side with respect to the retina in defocus at each wavelength occurring due to longitudinal chromatic aberration causes myopia to develop.

Using a wavelength filter to filter out the defocus component caused by longitudinal chromatic aberration and control the amount of light may help to suppress the progression of myopia. However, there is a problem in that if the amount of light is excessively attenuated, the object color recognition capability of a person will be significantly impaired. Further, there is a problem that the spectacle lens itself has a hue which is not preferable, thereby impairing the aesthetic sense. In view of this, it has been considered to attenuate the amount of light at an appropriate wavelength without impairing color recognition and aesthetic sense while continuing to contribute to the suppression of the development of myopia.

Note that in US2017/131567a, it is disclosed that the effect of inhibiting the progression of myopia is exhibited by the minute convex portions. On the other hand, by changing the minute convex portion into the minute concave portion, it can be expected that an effect of suppressing the progression of hyperopia will be exhibited due to the mechanism disclosed in US2017/131567a opposite to the mechanism of progression of myopia and the mechanism of suppression of progression of myopia. Further, in defocus at each wavelength occurring due to longitudinal chromatic aberration, the component of light focused on the over-focus side with respect to the retina can maintain or develop hyperopia, and the light component focused on the under-focus side can suppress hyperopia.

One embodiment of the present disclosure is intended to be able to control the amount of defocused light at each wavelength due to longitudinal chromatic aberration, without impairing the effect of inhibiting the development of myopia or hyperopia.

An aspect of the present disclosure is obtained based on the following technical idea.

-the effect of inhibiting the progression of myopia is achieved using monochromatic aberrations in the lens.

-using a wavelength filter to take advantage of longitudinal chromatic aberration produced in white light when using the lens to reduce the contribution to the effect of inhibiting myopia progression. In this case, the wavelength filter has a function of attenuating a long wavelength light longer than the set main wavelength.

According to the embodiments of the present disclosure, the amount of defocused light at each wavelength due to longitudinal chromatic aberration can be controlled, and the effect of suppressing the progression of myopia or hyperopia is not affected.

Hereinafter, one aspect of the present disclosure will be described. The following description is exemplary, and the disclosure is not limited to the aspects described as examples. Note that in this specification, "to" when a range of values is described means above a predetermined numerical value and below the predetermined numerical value.

An eyeglass lens according to one aspect of the present disclosure

An ophthalmic lens according to an aspect of the present disclosure is a myopia progression inhibiting lens, which may be based on an ophthalmic lens according to US2017/131567 a. The specific configuration of the eyeglass lens is as follows.

"an ophthalmic lens configured to provide an effect of inhibiting the progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a beam of rays passing through the ophthalmic lens and through the pupil,

the ophthalmic lens includes a wavelength filter for comparing a set dominant wavelengthFurthermore, the utility modelLong wavelength light attenuation. "

The type of the ophthalmic lens on which this configuration is based is not particularly limited in one aspect as long as the ophthalmic lens has a characteristic of suppressing the progression of myopia (a characteristic of suppressing the progression of hyperopia in the case of a modified example described later). Examples of ophthalmic lenses include spectacle lenses or contact lenses. In one aspect of the present disclosure, an eyeglass lens is shown as an example.

The spectacle lens has an object-side surface and an eyeball-side surface. The "object side surface" is a surface on the object side when a wearer wears glasses including spectacle lenses, and is a so-called outer surface. The "eyeball-side surface" is a surface on the opposite side (i.e., eyeball side) when a wearer wears eyeglasses including an eyeglass lens, and is a so-called inner surface. In one aspect of the present invention, the object-side surface is convex and the eyeball-side surface is concave. That is, an eyeglass lens according to an aspect of the present disclosure is a meniscus lens.

In an ophthalmic lens according to an aspect of the present disclosure, a pencil beam as a bundle of rays passing through the ophthalmic lens and through the pupil is focused at least two locations. "monochromatic aberration" means aberration other than "chromatic aberration (including longitudinal chromatic aberration)", and means that light is not focused at a point at a certain wavelength.

In an ophthalmic lens according to an aspect of the present disclosure, a portion of the pencil beam, which is a bundle of rays of light passing through the ophthalmic lens and through the pupil, is focused on the retina. That is, the convention of eyeglass lenses is realized. Hereinafter, the pencil beam as a bundle of rays passing through the pupil will be simply referred to as a pencil beam.

On the other hand, another part of the pencil beam is focused to the over-focus side with respect to the retina (as shown, for example, in fig. 4), thus exhibiting an effect of inhibiting the progression of myopia. This is also referred to as "providing an effect of inhibiting the progression of myopia using monochromatic aberration".

In this specification, a case is exemplified in which a part of the pencil beam is focused on the retina, and another part is focused to the over-focus side with respect to the retina, and an effect of suppressing the progression of myopia is exhibited.

Further, an ophthalmic lens according to an aspect of the present disclosure includes a wavelength filter that attenuates longer wavelength light than a set dominant wavelength. According to this configuration, the component of light that appears due to longitudinal chromatic aberration, that is, the component of light focused toward the under-focus side with respect to the retina is reduced.

"set dominant wavelength" means a wavelength (green wavelength) higher than 534nm, which is the wavelength at which M cones have the highest sensitivity. Note that this sensitivity varies depending on whether it is light or dark. In view of this, the dominant wavelength set may have a value in the range of 500 to 585 nm. It may be desirable for the range to be 515 to 550nm, or even from 532 to 575nm, and values in this range may be used. In one example, the optimal range of the set dominant wavelength value is from 564 to 570nm, where the sensitivity of M cones is lower than that of L cones.

"attenuating light having a longer wavelength than a set dominant wavelength" means to reduce the average transmittance of light having a longer wavelength than the dominant wavelength (for example, a longer wavelength than 564 to 570nm in an optimum condition). The wavelength filter may be implemented in a number of different forms to have such attenuation characteristics. Although there is also no particular limitation on the upper limit of the long wavelength, the upper limit may be 780nm or 830 nm.

Note that attenuation of light of a long wavelength using a wavelength filter may also be used to control spectral transmittance indicating transmittance of each wavelength.

That is, with the ophthalmic lens according to an aspect of the present disclosure, a myopia-suppressing effect is provided by focusing a part of a pencil beam entering the ophthalmic lens on an over-focus side with respect to a retina using monochromatic aberration. In addition to this, among the components of light that occur due to longitudinal chromatic aberration, the component of light focused on the under-focus side with respect to the retina can be reduced. As a result, the effect of inhibiting the progression of myopia is not impaired. Note that "focusing" is not necessarily limited to focusing in the narrow sense in which substantially non-anomalous light is concentrated at one point, and also includes focusing in a broad sense, such as a position where the concentration of flare light is high in a refractive lens.

Details of an eyeglass lens according to an aspect of the present disclosure

Hereinafter, further specific examples, preferred examples, and modified examples of an aspect of the present disclosure will be described.

Although there is no particular limitation on the eyeglass lens according to an aspect of the present disclosure, a monofocal lens is given as an example thereof. An eyeglass lens according to one aspect of the present disclosure is a monofocal lens corresponding to an object distance of a middle distance (1m to 40cm) or a short distance (40cm to 10 cm). Of course, the technical idea of the present disclosure may also be applied to a single-focus lens corresponding to an infinite distance, but a single-focus lens corresponding to a middle distance or a short distance is shown as one aspect of the present disclosure.

Note that the eyeglass lens according to an aspect of the present disclosure may also be a bifocal lens having two focal points, or a trifocal lens having three focal points. It is also possible to use a progressive refractive lens comprising a proximal portion corresponding to a near distance, a distal portion corresponding to a distance greater than the near distance, and an intermediate portion having a progressive action connecting the proximal and distal portions.

In the ophthalmic lens, it is preferable to include a predetermined position AP which is a portion for focusing a part of the pencil beam entering the ophthalmic lens on an over-focus side with respect to the retina by monochromatic aberration to provide an effect of suppressing the progression of myopia, and a base BP which is a portion adjacent to the predetermined position AP and which focuses a part of the pencil beam entering the ophthalmic lens on the retina.

The base BP is a portion having a shape and refractive index for realizing the same convention as a conventional ophthalmic lens. Note that the base BP is adjacent to and may also surround the predetermined position AP. On the other hand, if the predetermined position AP is adjacent to another predetermined position AP', the base BP may be adjacent to the predetermined position AP without surrounding the predetermined position AP.

Further, it may be necessary to implement the predetermined position AP as a part to which the optical path is added to focus the pencil beam passing through the predetermined position AP on the through-focus side with respect to the retina when compared with the base BP.

The "adding the optical path" may be realized by, for example, at least one of the following.

Increasing the distance of the lens portion traversed by the light rays at the predetermined position AP compared to the base BP (for example, forming a convex region protruding from the base BP).

-changing the refractive index of the predetermined position AP compared to the base BP.

In other words, this "adding optical path" indicates adding high-order monochromatic aberrations of fourth or higher order to a pencil beam passing through a range of 4mm in diameter including the predetermined position AP and the base BP in the ophthalmic lens.

"adding higher-order monochromatic aberration of fourth or higher order to light emitted from an ophthalmic lens" means to distinguish a boundary between a base and a small lens portion of a simple progressive refractive lens or a simple bi-focal lens from a predetermined position AP. Comprehensively described, if there is no predetermined position AP, only low-order aberrations of the second order or less are added. On the other hand, since there is a convex portion region, a concave-convex portion region, or a different refractive index material region, which will be described later, a high-order chromatic aberration of four orders or more is added.

In the present specification, the term "cross section" means a cross section of a lens taken in a plane including an optical axis of the lens. In at least a cross section taken in one such plane, high-order monochromatic aberrations of the fourth or higher order are added to the light emitted from the ophthalmic lens. It may be desirable that in cross-sections taken in all of these planes, high-order monochromatic aberrations of the fourth or higher order are added to the light emitted from the ophthalmic lens.

In one aspect of the present disclosure, the portion of the pencil beam that would be focused by base BP on the retina is focused on the over-focus side relative to the retina if there is no predetermined position AP. Note that otherwise, part of the pencil beam will become stray light, and will not be focused on the retina or the over-focus side.

One feature of an aspect of the present disclosure is to use the predetermined position AP to move the focal position of a pencil beam that would otherwise be focused on the retina away from the retina with the base BP. The change in focus position is also referred to as "defocus". The portion of the pencil beam which has passed through the predetermined position AP and focused on the over-focus side with respect to the retina exhibits an effect of suppressing the progression of myopia.

On the other hand, the pencil beam portion which has passed through the ophthalmic lens and focused on the under-focus side suppresses the effect of suppressing the progression of myopia. In view of this, in one aspect of the present disclosure, since a wavelength filter described later is provided, light focused toward the under-focus side with respect to the retina is attenuated. Thus, the risk of the effect of inhibiting the progression of myopia being impeded is reduced.

That is, combining the following two configurations is one feature of one aspect of the present disclosure:

defocusing to the over-focus side with respect to the retina is caused by a predetermined position AP provided on the ophthalmic lens, and

light that would otherwise be focused to the under-focus side relative to the retina is attenuated due to longitudinal chromatic aberration (i.e. light that inhibits the effect of inhibiting the progression of myopia).

The predetermined location AP may be required to satisfy at least one of the following three conditions.

(1) The predetermined position AP includes a convex portion region protruding from a base BP of at least one of an eyeball-side surface and an object-side surface of the ophthalmic lens to focus a part of the pencil beam on an afocal side with respect to the retina.

(2) The predetermined position AP comprises a refractive structure on at least one of an eyeball side surface and an object side surface of the ophthalmic lens to focus a portion of the pencil beam to an over-focus side with respect to the retina using a refractive action of the predetermined position AP.

(3) The predetermined position AP is provided on at least one of an eyeball-side surface and an object-side surface of the ophthalmic lens, and includes a different-refractive-index material region having a refractive index different from that of the base portion BP to focus a part of the pencil beam on an over-focus side with respect to the retina with an interaction of the predetermined position AP and the base portion BP.

Condition (1) includes setting at the predetermined position AP such that a plurality of (e.g., 100 or more, preferably 500 or more, more preferably 1000 or more) convex portions are surrounded by the base BP (e.g., similar to the arrangement of minute convex portions provided on the eyeglass lens as described in US 2017/131567 a). This aspect is mainly described in the present specification.

On the other hand, the case where one, two, or three convex regions (including also a small lens such as a bifocal lens) are set as the predetermined position AP is also included in the condition (1). Also included are situations where the convex region has a circular ring shape relative to the lens center. Lens center herein means a geometric center, a centering center or an optical center of an eyeglass lens. In this embodiment, a case where the centering center is used will be described as an example.

The condition (2) is a case where a region (phase diffraction structure) in which one section of the lens is zigzag or concave-convex is provided at the predetermined position AP, such as a refractive lens or a fresnel lens. Further, the concave-convex shape may also be a periodic structure, or a non-periodic structure, such as surface roughness formed in embossing. In addition, areas patterned in the shape of a circular ring around the center of the lens can also be used. Note that the condition (2) also includes a case where one, two, or three concave-convex areas are provided as the predetermined positions AP. Focusing performed using a refractive action may be performed using the above-described phase diffraction structure and an amplitude refractive structure that causes a refractive action using a transmittance difference between a light shielding portion and a transmission portion.

In the above-described conditions (1) and (2), high-order monochromatic aberrations of the fourth or higher order are added to the light emitted from the ophthalmic lens due to the "shape" of the cross section of the ophthalmic lens or the difference in transmittance of the ophthalmic lens.

Note that the convex region or the concave-convex region may be formed on the lens base material itself, or may be formed on a hard coat film or the like formed on the lens base material.

In addition to this, for one lens substrate, the film may be formed on the predetermined position AP, or the film may be formed at a position other than the predetermined position AP (for example, the entire base BP). Alternatively, the film a may be formed at the predetermined position AP, and the film b different from the film b may be formed at a position other than the predetermined position AP.

For the predetermined position AP in the condition (3), the shapes of the eyeball-side surface and the object-side surface of the eyeglass lens are similar to the shape of the base BP. On the other hand, when viewed in cross section, the predetermined position AP has a refractive index different from that of the base BP.

Specific examples include a case where the optical path of light when passing through an eyeglass lens is changed by changing at least a part of a raw material in an area from an object side surface to an eyeball side surface in a lens base material of the eyeglass lens made of a raw material of the base BP.

In addition to this, for one lens substrate, the film may be formed at the predetermined position AP, or the film may be formed at a position other than the predetermined position AP (for example, the entire base BP). Alternatively, the film a may be formed at the predetermined position AP, and the film b different from the film b may be formed at a position other than the predetermined position AP.

Regarding the predetermined position AP in the condition (3), similarly to the condition (1), the predetermined position AP may also be set to be surrounded by the base BP (for example, as shown in fig. 1A to 1D), and the predetermined position AP may also be set to be a circular ring shape with respect to the lens center (for example, as shown in fig. 1D). Note that the condition (3) also includes a case where one, two, or three regions of different-refractive-index materials are provided at the predetermined position AP. In condition (3), the optical path length is increased or decreased using a different refractive index material of the ophthalmic lens section, and the wavefront is destroyed. As a result, high-order monochromatic aberrations of four or more orders are added to the light emitted from the ophthalmic lens.

Note that the above conditions (1) to (3) may also be combined as appropriate. That is, the predetermined position AP may be a combination of a convex region and a phase diffraction structure, for example. Therefore, the expression "the predetermined position AP includes the convex portion region" is used.

Fig. 1A to 1D are schematic front views of eyeglass lenses, showing positions of the predetermined positions AP in the above-described conditions (1) to (3). In each of fig. 1A to 1D, for convenience of description, a circular lens is shown instead of the eyeglass lens already fitted to the frame.

Fig. 1A is a schematic front view of the eyeglass lens in a case where the predetermined position AP is a convex portion area and the convex portion area is not provided in the center.

Fig. 1B is a schematic front view of the eyeglass lens in a case where the predetermined position AP is a convex area and the convex area is also provided at the center.

Fig. 1C is a schematic front view of the eyeglass lens in a case where only one predetermined position AP is set.

Fig. 1D is a schematic front view of the eyeglass lens when the predetermined position AP is formed in a ring shape.

Incidentally, the pencil beam described above may be regarded as light entering the pupil. This means that a part of the "light entering the pupil", when this "light" is a pencil beam passing through the ophthalmic lens, is focused on the retina, while another part is focused on the hyper-focal side with respect to the retina. For this purpose, an ophthalmic lens (e.g., a spectacle lens) may have such a minute shape as to separate the focal position of light of the same wavelength with respect to a plurality of pencil beams that are small enough to enter the pupil.

In connection with this, regarding "a part of the pencil beam passing through the ophthalmic lens is focused on the retina" and "another part of the pencil beam passing through the ophthalmic lens is focused on the through-focus side with respect to the retina" in one aspect of the present disclosure, even when light of the same wavelength is used, the light is focused on the retina through the base BP, and the light is focused on the through-focus side with respect to the retina through the predetermined position AP. Note that although there is no particular limitation on the ratio of the amount of light focused on the through-focus side to the amount of light focused on the retina, the ratio is preferably set in the range of 1:10 to 1:1 to appropriately exhibit the effect of suppressing the progression of myopia. Note that the amount of light can be tracked by using a known ray tracing method.

Note that it may be desirable that all light other than light focused on the hyper-focal side relative to the retina is focused on the retina. For this reason, among the light of the predetermined wavelength passing through the ophthalmic lens, by passing the light through the predetermined position AP which is a part of the ophthalmic lens, it is possible to focus the light which would otherwise be focused on the retina on the overfocus side with respect to the retina.

On the other hand, there is also a possibility that a part of the light becomes stray light without being focused and a part of the light is focused on the under-focus side with respect to the retina. However, in this case, as long as the amount of light focused on the through-focus side is appropriate, desired suppression of development can also be achieved. For example, it may be necessary for the total amount of light other than the light focused on the through-focus side and the light focused on the retina to be 10% or less as a percentage of the sum of the amount of light focused on the through-focus side and the amount of light focused on the retina.

The exact pupil diameter varies from person to person, but is typically 4 mm. Therefore, it may be necessary to add high-order monochromatic aberrations of four or more orders by a pencil beam of a range of 4mm in diameter including the predetermined position AP and the base BP in the plan view of the ophthalmic lens (in the view facing the object side surface). When the above conditions (1), (2) and/or (3) are satisfied, a condition of adding a section of an ophthalmic lens within a range of 4mm including the diameter of the predetermined position AP may be required. The same applies to the other examples described above, and the above examples may need to be considered within a range of 4mm in diameter including the predetermined position AP.

The wavelength filter may be implemented in various forms to have a characteristic of attenuating light of a long wavelength longer than a set main wavelength. For example, if the dominant wavelength is set to 534nm, it may be necessary for the wavelength filter to have a characteristic of attenuating light having a wavelength of 564nm or more, which is a red wavelength. Note that although there is no particular limitation on the degree of attenuation, it may be desirable that the average transmittance of light having a wavelength of at least 564nm or more is one-half or less, even one-third or less, as compared with the state before the wavelength filter is provided.

Further, in order to prevent a significant change in saturation, light having a wavelength of 477 to 505nm (a region where the color matching function of r is negative and b and g are half of the peak or less) may also be attenuated. It may be desirable that the degree of attenuation be in a range of values similar to those described in the preceding paragraph.

Although the method of adding the wavelength filter is not particularly limited, the wavelength filter can be formed by, for example, dyeing a spectacle lens having a processed lens base material, a hard coat film, or the like. In addition to this, a coloring material may be selected as the material of the lens base material, so that the function of the wavelength filter may be included in the lens base material itself. At this time, a lens base material may be selected for the predetermined position AP, a coloring material may be selected for the lens base material, and a coloring material may be selected for the entire lens base material, and the color of the predetermined position AP and the color of the base BP may be made different from each other. In addition, coating can also be performed on a lens base material or a spectacle lens similarly to a hard coat film. The transmittance can also be controlled by applying a reflective coating.

If the spectacle lens is to be colored, the coloring treatment may be performed on at least one of the object side surface and the eyeball side surface, or may be performed on the entire lens base material 2.

The position to which the wavelength filter is added may be provided in the convex region of the above condition (1), the concave-convex region of the above condition (2), and/or the region of the different refractive index material of the above condition (3). For example, in the case of the above condition (1), defocusing occurs due to the predetermined position AP, and therefore there is a risk that: the light rays will be focused on the over-focus side with respect to the retina and the light rays will be focused on the under-focus side with respect to the retina, and by adding the wavelength filter at the predetermined position AP, the occurrence of defects caused by longitudinal chromatic aberration at positions where such defects are likely to occur can be directly suppressed. This means that the amount of light defocused at each wavelength due to longitudinal chromatic aberration can be more reliably controlled.

However, the position where the wavelength filter is added is not limited to the above-described position. For example, it may be necessary to add a wavelength filter to the entirety of at least one of the eyeball-side surface and the object-side surface of the lens base material or the entirety of at least one of the eyeball-side surface and the object-side surface of the eyeglass lens. A wavelength filter may also be added to portions other than the convex portion region, the concave-convex portion, and the different-refractive-index material region. A wavelength filter may also be added outside the circular area with a radius of 2.5mm to 10.0mm from the center of the lens. It is also possible to add a wavelength filter only in the portion below the center of the lens to make it easier to see traffic signs and signals.

The following aspects may also be employed. Note that the following aspect may also be adopted independently of the above-described "eyeglass lens according to an aspect of the present disclosure". The following aspects may be implemented to independently have the property of reducing damage to inhibit myopia progression.

"an ophthalmic lens configured to provide an effect of suppressing progression of myopia using monochromatic aberration of a pencil beam, which is a light beam passing through the ophthalmic lens and passing through a pupil, the ophthalmic lens having a spectral transmittance setting such that an average value of a defocus amount (diopter) x a light amount focused on an under-focus side with respect to a retina is smaller than an average value of a defocus amount (diopter) x a light amount focused on an over-focus side with respect to the retina. "

The above-described aspect is intended to define the relationship between rays focused at a position other than the retina, i.e., a power of divergence to the over-focus side (value α), which is considered to provide an effect of inhibiting the progression of myopia, and a power of divergence to the under-focus side (value β), which is considered to conversely inhibit the effect of inhibiting the progression of myopia. Further, similarly to the amount of light, the defocus amount (diopter) can be tracked by using a known ray tracing method.

It is possible to distinguish between light incident on a plurality of convex regions within a range of 4mm in diameter and light incident on the base region. In addition, as long as three-dimensional coordinates (intersection coordinates) at which light rays respectively incident to one of the plurality of convex regions intersect with each other can be obtained also at the other convex regions, a position at which the intersection coordinates are arranged in groups can be regarded as the focal position a (a1, a2, A3). Note that if a range of diameters greater than 4mm is considered, the overall result of the lens can be understood by performing the above-described tasks for each of the multiple zones.

By the ray tracing process, the coordinates of the outgoing portion where the light from the lens model enters each convex portion region and the vector from the outgoing portion can be obtained. In view of this, the average value of the coordinates of the intersection is obtained using the coordinates and the vector. For each cross coordinate, a small residual of the average of the cross coordinates means that the light is concentrated at the position corresponding to the respective convex area. Based on this concept, the position at which the residual of the average value of the intersection coordinates reaches its minimum value (in this embodiment, the position spaced 1/D (defocus amount in diopter) in the optical axis direction from the vertex of the eyeball-side surface (concave surface)) is found.

Hereinafter, a further specific configuration of an eyeglass lens according to an aspect of the present disclosure will be described.

Integral arrangement of spectacle lenses

As shown in fig. 1B, the eyeglass lens 1 has a plurality of convex regions 6 regularly arranged near the lens center. These convex areas 6 are predetermined positions AP. The portion other than the convex portion region 6 as the base portion is the base portion BP. The specific configuration of the convex portion region 6 will be described in detail later.

Fig. 2 is a sectional view showing an exemplary configuration of the eyeglass lens shown in fig. 1B.

As shown in fig. 2, the spectacle lens 1 has an object side surface 3 and an eyeball side surface 4. In addition, the eyeglass lens 1 is composed of a lens base 2, a wavelength filter 7 formed on the convex surface side of the lens base 2, a hard coat film 8 formed on the convex surface side and the concave surface side of the lens base 2, respectively, and an antireflection film 10 (antireflection (AR) film) formed on the outer surface of the hard coat film 8. Note that another film may be further formed in addition to the hard coat film 8 and the antireflection film 10 on the eyeglass lens 1.

Lens base material

The lens base material 2 is formed using, for example, a thermosetting resin material such as polycarbonate, CR-39, thiocarbamate, allyl, acryl, and episulfide. Of these materials, polycarbonate may be required. Note that as the resin material constituting the lens base material 2, another resin material that can obtain a desired refractive index may be selected. A lens base material made of inorganic glass may also be used instead of the resin material.

In an aspect of the present disclosure, a plurality of convex areas 6a are formed on the object side surface 3 (convex surface) of the lens base material 2 so as to protrude from the surface toward the object. The convex areas 6a are each formed by a curved surface having a curvature different from that of the object-side surface 3 of the lens base material 2.

Since the convex regions 6a are formed, the convex regions 6a each having a substantially circular shape are arranged in an island shape at equal intervals in the radial direction and the circumferential direction, with the lens center as the center, on the object side surface 3 of the lens base material 2 when viewed from the plane. The regions 6a are arranged in an island shape. In other words, the substantially circular convex regions 6a are arranged in a state of being spaced apart from each other without contacting each other (i.e., a state in which the base portion BP as a base portion exists between the convex regions 6 a).

Note that a plurality of convex portions 6a may also be formed on the object side surface 4 (concave surface) of the lens base material 2. A plurality of convex portions 6a may also be formed on both surfaces, i.e., the convex surface and the concave surface. For convenience of explanation, a case where a plurality of convex regions 6a are formed on the object side surface 3 (convex surface) will be described below as an example.

Wavelength filter

The wavelength filter 7 is formed using, for example, a dye. The wavelength filter 7 may be formed using a method of immersing the lens substrate 2 in a wavelength filter chemical solution, which is a dye. The amount of light defocused at each wavelength due to longitudinal chromatic aberration can be controlled by applying the wavelength filter 7.

Hard coating film

The hard coat film 8 is formed using, for example, a thermoplastic resin or a UV curable resin. The hard coat film 8 can be formed by immersing the lens base material 2 in a hard coat liquid, spin coating, or the like. By coating with the hard coat film 8, the durability of the eyeglass lens 1 is improved.

Anti-reflection film

The antireflection film 10 is deposited such as ZrO by vacuum deposition, for example₂、MgF₂Or Al₂O₃The anti-reflective agent of (1). By coating with the antireflection film 10, visibility of an image passing through the eyeglass lens 1 can be improved. Note that it is also possible to control the spectral transmittance of the antireflection film by controlling the material and film thickness of the antireflection film and to implement the antireflection film as a wavelength filter.

Shape of object-side surface

As described above, the plurality of convex areas 6a are formed on the object side surface 3 of the lens base material 2. Therefore, when the surface 3 is coated with the hard coat film 8 and the antireflection film 10, a plurality of convex portions 6b are formed by the hard coat film 8 and the antireflection film 10 in conformity with the convex portions 6a on the lens base material 2. In other words, the convex area 6 composed of the convex area 6a and the convex area 6b is arranged on the object side surface 3 (convex surface) of the eyeglass lens 1 to protrude from the surface 3 toward the object.

The convex area 6 coincides with the convex area 6a of the lens base material 2, and therefore is arranged in an island shape in a state of being arranged at equal intervals in the radial direction and the circumferential direction centering on the lens center, that is, is regularly arranged in the vicinity of the lens center similarly to the convex area 6 a.

As another aspect of the present disclosure, the convex portion region 6 may also be formed using the hard coat film 8, the antireflection film 10, a metal film such as Cr, and/or other insertion layers, instead of providing the convex portion region 6a on the lens substrate 2, and the base portion BP may be formed in addition to or instead of forming the predetermined position AP as the convex portion region 6.

Note that, as shown in fig. 1B of the present application, the convex area 6 may also be provided at a position where the optical axis at the center of the lens passes, and an area where the convex area 6 is not provided may also be ensured at a position where the optical axis passes, as shown in fig. 1A of the present application.

For example, the convex region 6 is configured as follows. It may be desirable for the diameter of the land area 6 to be about 0.8 to 2.0 mm. It may be desirable that the shortest distance between the land areas 6 is also about 0.8 to 2.0 mm. The protrusion height (protrusion amount) of the convex portion region 6 is about 0.1 to 10 μm, and the height may be required to be about 0.7 to 0.9 μm. A curvature of the convex region 6 of a spherical surface having a radius of about 50 to 250mm may be required, and a radius of 86mm may be required. By using such a structure, the refractive power of the convex section region 6 is set to be about 2.00 to 5.00 diopters larger than that of a region where the convex section region 6 is not formed.

Optical characteristics

With the spectacle lens 1 having the above-described configuration, since the convex area 6 is included on the object side surface 3, the following optical characteristics can be achieved, and as a result, progression of ametropia such as myopia of the spectacle wearer can be suppressed.

Fig. 3 is a schematic sectional view (1) showing a light path through the eyeglass lens shown in fig. 1B.

As shown in fig. 3, light that has made incident on the object-side surface 3 of the eyeglass lens 1 in a region where the convex portion region 6 is not provided (i.e., the base portion BP) exits from the eyeball-side surface 4 and is focused on the retina 20a of the eyeball 20. That is, in principle, the light rays passing through the spectacle lens 1 are focused on the retina 20a of the spectacle wearer. In other words, the curvature of the base BP of the eyeglass lens 1 is set according to the custom of the eyeglass wearer so that the focal point is formed on the retina 20a, i.e., the predetermined position B.

Fig. 4 is a schematic sectional view (2) showing an optical path through the eyeglass lens shown in fig. 1B.

On the other hand, as shown in fig. 4, in the eyeglass lens 1, the light having entered the convex portion region 6 exits from the eyeball-side surface 4 and is then focused at a position a on the through-focus side with respect to the retina 20a of the eyeball 20. In other words, the convex portion region 6 converges the light emitted from the eyeball-side surface 4 at a position a on the over-focus side with respect to the focal position B. According to each of the plurality of convex portions 6, the focal position A is taken as the position A₁、A₂、A₃And A_N(N is the total number of the convex portions 6).

Thus, in principle, the lens 1 causes the light entering from the object side surface 3 to exit from the eyeball side surface 4 and converge at the predetermined position B. On the other hand, the eyeglass lens 1 converges the light at a position a (a) on the through-focus side with respect to the predetermined position B at the portion where the convex portion region 6 is arranged₁、A₂、A₃.. and A_N) To (3).

Therefore, the eyeglass lens 1 has a function of converging light rays at the position a on the through-focus side, which is separate from the light converging function for realizing the convention of eyeglass wearers. By having such optical characteristics, the eyeglass lens 1 exhibits an effect of suppressing the progression of myopia.

In the light quantity evaluation method, the total number of rays when ray tracing is performed in a range of a pupil radius of 4mm is obtained. The term "pupil" herein refers to the entrance pupil of the optical system that includes the spectacle lens and the eye. The total number of light rays at a plurality of focal positions a at which light rays having passed through a plurality of convex portions in a predetermined evaluation region converge is obtained, and the total number of light rays at a focal position B on the retina is obtained. The total number of rays is also obtained if there is a focal position C on the under-focus side with respect to the retina. Then, the total number of rays at the focal positions A, B and C is subtracted from the total number of rays to obtain the stray light ray count.

A ray "converging at focal position a" may also be defined as a ray passing through an image plane including focal position a within a predetermined range from focal position a (e.g., within 1 arc of viewing angle). The same definition applies to rays converging at the focal position B. Further, the "number of rays at the focal position a or B" represents the number of rays condensed at the focal position a or B according to the above definition. Note that, in addition to the above-described method, a wave-optics method may also be used.

Method for manufacturing spectacle lens

A specific example of the method for manufacturing the spectacle lens 1 will be described.

In the production of the spectacle lens 1, first, the lens base material 2 is molded by a known molding method such as cast polymerization. For example, molding is performed by cast polymerization using a mold having a molding surface with a plurality of concave portions, to obtain a lens base material 2 having a convex portion region 6 on at least one surface.

Then, when the lens base material 2 is obtained, next, the wavelength filter 7 is formed on the surface of the lens base material 2. The wavelength filter 7 can be formed by a method of immersing the lens base material 2 in a wavelength filter chemical solution, or the like.

Next, a hard coating film 8 is deposited on the surface of the lens base material 2. The hard coat film 8 can be formed by immersing the lens base material 2 in a hard coat liquid, spin coating, or the like.

When the hard coat film 8 is deposited, the antireflection film 10 is further deposited on the surface of the hard coat film 8. The hard coat film 8 may be formed by depositing an antireflection agent by vacuum deposition. The antireflection film may also be further implemented as a wavelength filter.

By the manufacturing method in this step, the eyeglass lens 1 having the plurality of convex regions 6 protruding toward the object on the object side surface 3 can be obtained.

Aspects of regions other than the convex region, the concave-convex region, and the region of the different-refractive-index material

For example, the following configuration is given: a plurality of holes having a circular shape in a plan view are arranged in a dot pattern in a film (for example, a light-shielding film; here, a chromium film is taken as an example) formed on a hard coat film or on a lens base material or the like which is not provided with a convex region, an uneven region, a different refractive index material region or the like.

Fig. 5 shows a schematic front view and a partially enlarged view of an eyeglass lens including a modified example of a light shielding film (e.g., Cr film) provided with holes in the form of a dot pattern.

Note that it is sufficient to use a known method as a method of providing holes, and examples thereof are a method of coating a chemical in a dot pattern on the surface of a lens base material, a hard coat film on the surface, or the like, drying the chemical, then depositing a light-shielding film to cover the dried chemical in the dot pattern, and then removing the light-shielding of the chemical by removing the chemical, and as a result, holes are formed in the light-shielding film in the dot pattern.

Such spectacle lenses also provide an effect of inhibiting the development of myopia. Note that the spectacle lens has a myopia progression suppressing effect due to the effect of refracting light caused by the dot pattern (amplitude refractive structure) formed in the light shielding film.

For example, due to the photorefractive effect, non-zero order refracted light is collected at locations other than the retina. Further, it is one of the features of one aspect of the present disclosure to attenuate light on the under-focus side by providing a wavelength filter on the ophthalmic lens.

Thus, the amount of defocus at each wavelength can be controlled, and the effect of inhibiting the progression of myopia (or hyperopia, in embodiments as described herein) is prevented from being impeded.

Note that the diameter 2r of the hole and the pattern width d of the dot pattern shown in fig. 5 are not particularly limited as long as they are sized so as to exhibit the above-described light refracting effect.

In view of the above description, the predetermined position AP and the base BP may be described as follows to include the case where the portion where the film exists is set as the base BP, and to include what is described before the items of the present modified example.

"the above ophthalmic lens, comprising: a predetermined position AP; and a base BP as a portion adjacent to the predetermined position AP,

Wherein the light is focused on the retina and the light is focused at a position other than the retina due to the predetermined position AP and the base BP. "

Note that the film may also be provided in a dot pattern, as opposed to providing the holes in a dot pattern. That is, conversely, a portion where the membrane exists may be set as the predetermined position AP, and a portion where no hole is provided may be set as the base BP. The above expression is an expression that can also correspond to another modified example.

That is, the ophthalmic lens according to the present modification generates a refraction phenomenon depending on the state of the film. To this end, not only the specific area (e.g., the area of the aperture) contributes to the separation of light, but the film formed and thus the overall structure of the ophthalmic lens contributes to the separation of light.

Note that "difference in film state" in this context includes any of the following: a case where a hole is provided in the light shielding film as in the foregoing example; in contrast, the case where the light shielding film is provided only at the position corresponding to the hole; a case where a multilayer film is provided and a hole is provided only in a predetermined surface film; in contrast, many multilayer films are provided only at predetermined positions.

Finally, there is no limitation on aspects such as the present modified example, the convex area, the concave-convex area, or the different-refractive-index material area as long as the ophthalmic lens focuses light on the retina and on a position other than the retina using the predetermined position AP and the base BP.

Exhibits an effect of inhibiting the development of hyperopia

In the case where the aspect of suppressing the progression of hyperopia is exerted, in the description of any of the examples described above relating to the suppression of the progression of myopia, the respective descriptions of each of the examples are obtained by replacing the "over-focus side" with the "under-focus side", the "long wavelength" with the "short wavelength", and the "long wavelength exceeding 534 nm" with the "short wavelength below 534 nm".

The effect of suppressing the progression of hyperopia is exhibited in the following manner.

"an ophthalmic lens configured to provide an effect of suppressing the progression of hyperopia using monochromatic aberration of a pencil beam, the pencil beam being a beam of rays passing through the ophthalmic lens and through the pupil,

the ophthalmic lens includes a wavelength filter for attenuating short wavelength light shorter than a set dominant wavelength. "

Summary of the invention

Hereinafter, the ophthalmic lens of the present disclosure will be summarized.

One embodiment of the present disclosure is as follows.

"an ophthalmic lens configured to provide an effect of inhibiting the progression of myopia using monochromatic aberration of a pencil beam, the pencil beam being a bundle of rays passing through the ophthalmic lens and through the pupil,

the ophthalmic lens includes a wavelength filter for attenuating longer long wavelength light than a set dominant wavelength. "