阅读说明：本技术 连续变焦隐形眼镜 (Continuous zooming contact lens ) 是由 萧旭贵 于 2021-04-29 设计创作，主要内容包括：一种连续变焦隐形眼镜,包含有以一假定中心光轴为圆心所构成直径为0.5mm至6mm的一光学区,光学区的屈光度由中心光轴向外侧的圆形区域连续改变,光学区的一第一屈光度形成相对应的一第一焦距,光学区的一第二屈光度形成相对应的一第二焦距,第一焦距与第二焦距之间的差距范围为一景深范围,景深范围内形成的一影像品质优于景深范围外形成的影像品质,本发明具有减少睫状肌长时间紧绷收缩以达到有效舒缓眼睛压力和矫正视力老花的症状的优点。(A kind of contact lens of continuous zooming, include and regard a presumed central optical axis as a centre of a circle to form a diameter to be an optical area of 0.5mm to 6mm, the diopter of the optical area is changed continuously by the outside round area of central optical axis, a first diopter of the optical area forms a corresponding first focal length, a second diopter of the optical area forms a corresponding second focal length, the difference range between second focal length and the first focal length is a depth of field range, an image quality formed in the depth of field range is superior to the image quality formed outside the depth of field range, the invention has the advantage that the ciliary muscle is tightened and contracted in order to achieve the symptom that the effective relief eye pressure and correction vision presbyopia take place for a long time.)

1. A continuous-zoom contact lens, comprising:

an optical zone, which is a circular zone with the diameter of 0.5mm to 6mm and is formed by assuming the central optical axis as the center of a circle, wherein the diopter of the optical zone is continuously changed from the circular zone outside the central optical axis, a first diopter of the optical zone forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length;

and the depth of field range is the difference range between the first focal length and the second focal length, and the quality of an image formed in the depth of field range is superior to that formed outside the depth of field range.

2. A zoom lens as recited in claim 1, wherein the ADD of the depth of field range is in a range between 0.5 and 4.0D.

3. The progressive-zoom contact lens of claim 1, wherein the focal length within the depth of field continuously increases from the first focal length to the second focal length.

4. The zoom lens of claim 1, wherein the focal length within the depth of field decreases continuously from the first focal length to the second focal length.

5. The progressive-zoom contact lens of claim 1, wherein the focal length within the depth of field increases from the first focal length to the second focal length and decreases.

6. The progressive zoom contact lens of claim 5, wherein the optical zone has a first optical zone and a second optical zone extending outwardly from the first optical zone, the depth of field range having a first range corresponding to the first optical zone and a second range corresponding to the second optical zone, the focal length in the first range increasing in a trend and the focal length in the second range decreasing in a trend.

7. The progressive-zoom contact lens of claim 1, wherein the focal length within the depth of field decreases from the first focal length to the second focal length and increases.

8. The progressive zoom contact lens of claim 7, wherein the optical zone has a first optical zone and a second optical zone extending outwardly from the first optical zone, the depth of field range having a first range corresponding to the first optical zone and a second range corresponding to the second optical zone, the focal length in the first range decreasing in a decreasing trend and the focal length in the second range increasing in an increasing trend.

9. The continuous-zoom contact lens of claim 6 or 8, wherein the first optical zone is a circular area with a diameter of 0.5mm to 4mm centered on an assumed central optical axis, and the second optical zone is a circular area with a diameter of 4mm to 6mm centered on an assumed central optical axis.

Technical Field

The present invention relates to contact lenses, and more particularly, to a contact lens having a continuous zooming function.

Background

When a human eye views an object, the eye automatically adjusts the shape and thickness of the crystalline lens through the ciliary muscle to achieve the purpose of focusing, when the eye looks far away, the ciliary muscle is in a relaxed state, the crystalline lens becomes thinner to adjust the focal length, otherwise, when the eye looks near, the ciliary muscle is in a contracted and tensed state, the crystalline lens is expanded to adjust the focal length, with the increase of the age, the crystalline lens is found to be required to be more than about 30 centimeters or even farther to see clearly when the eye reads near, or the eye needs to see a target after a few seconds when the eye alternates far and near, and the symptoms are caused because the crystalline lens and related matching adjusting tissues in the eye gradually lose elasticity, the adjusting function is reduced, so that the ciliary muscle contracts but the crystalline lens cannot deform, and the target object at the near can not be seen clearly.

As described in taiwan new patent No. M582144, with reference to fig. X, the multifocal soft contact lens includes a central region, a transition region, an annular region, a connecting region and an outer periphery, unfortunately, the central region and the annular region have a certain difference, and when a wearer changes between far-looking and near-looking, the wearer may have a vision jump due to the sharp change of diopter, and thus may feel dizzy or other uncomfortable.

Therefore, it is the primary objective of the present invention to solve the above problems.

Disclosure of Invention

It is a primary object of the present invention to provide a continuous variable focus contact lens having the efficacy of relieving eye pressure and correcting presbyopia.

To achieve the above object, the present invention provides a continuous-zooming contact lens, which comprises an optical zone, a circular zone with a diameter of 0.5mm to 6mm formed by assuming a central optical axis as a center of a circle, wherein diopter of the optical zone is continuously changed from the circular zone outside the central optical axis, a first diopter of the optical zone forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length.

And the depth of field range is the difference range between the first focal length and the second focal length, and the quality of an image formed in the depth of field range is superior to that formed outside the depth of field range.

Preferably, the ADD of the depth of field range is in a range between 0.5 and 4.0D.

Preferably, the focal length within the depth of field range continuously increases from the first focal length to the second focal length.

Preferably, the focal length within the depth of field is continuously decreasing from the first focal length to the second focal length.

Preferably, the focal length within the depth of field is gradually increased and then gradually decreased from the first focal length to the second focal length.

Preferably, the optical zone has a first optical zone and a second optical zone extending outward from the first optical zone, the depth of field range has a first range corresponding to the first optical zone, and a second range corresponding to the second optical zone, the focal length in the first range is in an increasing trend, and the focal length in the second range is in a decreasing trend.

Preferably, the focal length within the depth of field is gradually decreased and then gradually increased from the first focal length to the second focal length.

Preferably, the optical zone has a first optical zone and a second optical zone extending outward from the first optical zone, the depth of field range has a first range corresponding to the first optical zone, and a second range corresponding to the second optical zone, the focal length in the first range is in a decreasing trend, and the focal length in the second range is in an increasing trend.

Preferably, the first optical zone is a circular area with a diameter of 0.5mm to 4mm formed by taking an assumed central optical axis as a center, and the second optical zone is a circular area with a diameter of 4mm to 6mm formed by taking an assumed central optical axis as a center.

The above objects and advantages of the present invention will be readily understood by the following detailed description of the selected embodiments and the accompanying drawings.

Drawings

FIG. 1 is a schematic plan view of a continuous variable focus contact lens of the present invention;

FIG. 2 is a schematic plan view of the optical zone and the depth of field according to the present invention;

FIG. 3 is a focus distribution diagram of the first embodiment of the present invention;

FIG. 4 is a focus distribution diagram of a second embodiment of the present invention;

FIG. 5 is a focus distribution diagram of a third embodiment of the present invention;

FIG. 6 is a focal length distribution diagram according to a fourth embodiment of the present invention.

Detailed Description

Referring to fig. 1 and 2, a first embodiment of the present invention is shown for illustration purposes only and is not limited by the embodiments described in the present application.

The continuous-zoom contact lens 1 according to the first embodiment of the present invention includes an optical area 10, a depth of field 20, and a peripheral area 30, wherein:

the optical zone 10 is designed such that the center of the continuous variable focus contact lens 1 is taken as an assumed central optical axis L, and a circular area with a diameter of 0.5mm to 6mm is formed by being surrounded by the assumed central optical axis L, the reason why the optical zone is designed is that under normal use of the eyes of a general person, the visible area is mostly located in the circular area with a diameter of 6mm, the radius of curvature (Base Curve) of the inner surface of the optical zone 10 is between 8.0mm to 9.0mm, if the Base Curve of the lens is too large, the lens can not be attached to the eyeball and is easy to shift, and if the Base Curve of the lens is too small, the eyes are easy to feel tight and uncomfortable, generally, the Base Curve of the lens is about 1.1 times the Base Curve of the eyeball, furthermore, in the present embodiment, the continuous variable focus contact lens 1 is an optical system with a front Curve being an aspheric surface and a back Curve being a single curvature, in other embodiments, the continuous-zoom contact lens 1 may be an optical system composed of a front arc with a single curvature and a rear arc with an aspheric surface, or an optical system composed of a front arc and a rear arc with both aspheric surfaces, which are all within the scope of the present invention.

The equation of the aspherical optical system of the present invention is as follows:

z-surface profile of a surface parallel to the optical axis

s-radial distance from the optical axis

C is reciprocal of curvature and radius

k is conic constant

A4, a6, A8 … are aspheric coefficients of 4 th, 6 th, 8 th …

When k is 0, the conical surface is a spherical surface; when k > -1, the conical surface is elliptical; when k is-1, the conical surface is a paraboloid; when k < -1, the conical surface is hyperboloid.

The continuous variable focus contact lens 1 of the aspherical optical system according to the present invention can be manufactured by a conventional manufacturing method, which can be roughly classified into three types: including lathing (lathing), Molding (Cast Molding), and spinning (Spin Molding).

The continuous variable focus contact lens 1 of the present invention may be made of: hydroxyethyl methacrylate (HEMA), Methyl Methacrylate (MMA), a copolymer of Methyl Methacrylate (MMA) and glycerol acrylate, a hydrophilic hydrogel, a hydrophobic silica hydrogel, to name but a few, are examples of materials that may be selected for use in the present invention.

The continuous variable focus contact lens 1 of the present invention is suitable for use with various types of soft contact lenses, such as: silica gel soft contact lenses, multifocal soft contact lenses, water-gradient soft contact lenses, light-diffusing soft contact lenses, water-gel soft contact lenses, blue-light filtering soft contact lenses, and colored soft contact lenses. The continuous variable focus contact lenses 1 of the present invention are suitable for use with a variety of hard contact lenses, such as: night wearing hard contact lenses, light scattering hard contact lenses, aspheric hard contact lenses and special hard contact lenses for keratoconus.

The optical zone 10 includes a first optical zone 11 and a second optical zone 12, wherein the first optical zone 11 is a circular area surrounded by the assumed central optical axis L as the center, in the embodiment, the diameter of the first optical zone 11 is 0.5mm to 4mm, and in the actual structure design, the diameter of the first optical zone 11 is not limited to the range of 0.5mm to 4mm, and can be adjusted according to the imaging quality or the manufacturing technology. The diopter of the first optical zone 11 continuously changes from the assumed central optical axis L along the radial direction, and more specifically, the diopter of the first optical zone 11 continuously increases from the assumed central optical axis L along the radial direction, and the diopter of the first optical zone 11 also continuously decreases from the assumed central optical axis L along the radial direction, the setting of the aforesaid trend can be adjusted according to the actual requirement of the wearer, and the setting of the trend also includes the initial diopter of the first optical zone 11, for example, if the wearer is a hyperopic patient, the diopter suitable for the hyperopic patient should be used as the initial value.

The second optical zone 12 is a circular area extending outward from the first optical zone 11. in the present embodiment, the second optical zone 12 is a circular area with a diameter of 4mm to 6mm surrounded by the assumed central optical axis L as the center of the circle, and in the actual structural design, the diameter of the first optical zone 11 is not limited to the range of 4mm to 6mm, and can be adjusted according to the imaging quality or the manufacturing technology. The diopter of the second optical zone 12 continuously changes from the assumed central optical axis L to the outside along the radial direction, and more specifically, the diopter of the second optical zone 12 continuously increases from the assumed central optical axis L to the outside along the radial direction, and the diopter of the second optical zone 12 also continuously decreases from the assumed central optical axis L to the outside along the radial direction, and the setting of the aforesaid trend can be adjusted according to the actual requirement of the wearer.

The peripheral zone 30 is a circular zone surrounded by the assumed central optical axis L as a circle center and having a diameter of other than 6mm, the peripheral zone 30 is a non-primary visual zone and has no effect of correcting vision, the structural design of the peripheral zone 30 mainly improves the comfort level of the wearer when using the continuous zoom contact lens 1, the continuous zoom contact lens 1 can be stably attached to the cornea of the eye by increasing the wearing area of the continuous zoom contact lens 1 and the eye, and the wearer is prevented from feeling discomfort due to the fact that the continuous zoom contact lens 1 slides to the inner side of the eyelid.

Referring to fig. 2 again, the optical zone 10 has a first refractive power 13 at a position adjacent to the assumed central optical axis L, the first refractive power 13 forms a corresponding first focal length 14, the optical zone 10 has a second refractive power 15 at a position away from the assumed central optical axis L, the second refractive power 15 forms a corresponding second focal length 16, the first refractive power 13 is smaller than the second refractive power 15, so that the corresponding first focal length 14 is larger than the second focal length 16, the difference range between the first focal length 14 and the second focal length 16 forms the depth of field range 20, an image quality formed within the depth of field range 20 is better than an image quality formed outside the depth of field range 20, in other words, the depth of field range 20 has a visual correctable effect, the ADD of the depth of field range 20 is in a range between 0.5D and 4.0D, and particularly, because the first refractive power 13 and the second refractive power 15 have a continuously changing trend, therefore, the focal length variation within the depth of field 20 formed by the corresponding first focal length 14 and the corresponding second focal length 16 also tends to be continuously varied.

The depth of field range 20 can be further divided into a first range 21 and a second range 22, the first range 21 has a corresponding relationship with the first optical zone 11 of the optical zone 10, and the second range 22 has a corresponding relationship with the second optical zone 12 of the optical zone 10, so that when the diameter ranges of the first and second optical zones 11, 12 are adjusted according to design requirements, the ranges of the first and second ranges 21, 22 of the depth of field range 20 are correspondingly changed.

When the wearer watches the objects with different distances, the brain of the wearer can judge the distance and select the most appropriate focal distance from the depth of field range 20, so that the objects can be accurately imaged on the retina of the wearer to generate clear visual images, more specifically, when the wearer stares at the objects with closer distances, the brain of the wearer can select the focal distance most suitable for looking at the objects from the depth of field range 20, so that the ciliary muscle of the wearer does not need to exert excessive force, the situation that the ciliary muscle is tensed and contracted for a long time is reduced, and the purpose of effectively relieving the eye pressure is achieved; when the wearer gazes at a target object with a long distance, the brain of the wearer can select the focal length most suitable for the object to be seen far from the depth of field range 20, so that the wearer can clearly see the target object with a long distance.

The continuous-zoom contact lens 1 provided by the present invention is also suitable for the wearer with reduced lens adjusting function, when the wearer with reduced lens adjusting function wants to see the object at a close distance, the focal length of the object can be selected from the depth of field range 20 through the brain of the wearer, so that the object can be accurately imaged on the retina of the wearer even if the curvature of the lens is not significantly changed for focusing, thereby generating a clear visual image.

Referring to fig. 3, in the continuous variable focus contact lens 1 according to the first embodiment of the invention, the position of the optical zone 10 adjacent to the assumed central optical axis L has the first refractive power 13, the position of the optical zone 10 away from the assumed central optical axis L has the second refractive power 15, the first focal length 14 corresponding to the first refractive power 13 is about 0.33m, the second focal length 16 corresponding to the second refractive power 15 is about 1m, the ADD of the depth of field range 20 is 2.0, and the focal lengths within the depth of field range 20 are continuously increasing from the first focal length 14 to the second focal length 16. When the wearer views objects at different distances, the brain of the wearer can select the most appropriate focal length from the depth of field range 20 (0.33m to 1m), so that the object can be accurately imaged on the retina to generate a clear visual image, and the wearer does not feel dizzy discomfort caused by the sharp change of the focal length when viewing near and far objects because the focal length in the depth of field range 20 of 0.33m to 1m is continuously increasing.

Referring to fig. 4, in the continuous variable focus contact lens 1 according to the second embodiment of the invention, the position of the optical zone 10 adjacent to the assumed central optical axis L has the first refractive power 13, the position of the optical zone 10 away from the assumed central optical axis L has the second refractive power 15, the first focal length 14 corresponding to the first refractive power 13 is about 1m, the second focal length 16 corresponding to the second refractive power 15 is about 0.33m, the ADD of the depth of field range 20 is 2.0, and the focal lengths within the depth of field range 20 are continuously decreasing from the first focal length 14 to the second focal length 16. When the wearer views objects at different distances, the brain of the wearer can select the most appropriate focal length from the depth of field range 20 (1m to 0.33m), so that the object can be accurately imaged on the retina to generate a clear visual image, and the wearer does not feel dizzy discomfort caused by the sharp change of the focal length when viewing the near and far objects because the focal length in the depth of field range 20 of 1m to 0.33m is in a continuously decreasing trend.

Referring to fig. 5, in a continuous variable focus contact lens 1 according to a third embodiment of the present invention, the optical zone 10 has the first refractive power 13 at a position adjacent to the assumed central optical axis L, the optical zone 10 has the second refractive power 15 at a location remote from the assumed central optical axis L, the first refractive power 13 forms a corresponding first focal length 14 of about-0.33 m, the second refractive power 15 forms a corresponding second focal length 16 of about-0.33 m, the ADD of the depth of field 20 is 2.0, and the focal lengths within the depth of field 20 gradually increase from the first focal length 14 to the second focal length 16 and gradually decrease, more specifically, the focal length of the first optical zone 11 (circular area with a diameter of 0.5mm to 4 mm) within the first range 21 is gradually increased, the focal length of the second optical zone 12 (circular area with a diameter of 4mm to 6 mm) in the second range 22 decreases.

When a wearer watches a target object at a short distance, the target object can be accurately imaged on the retina to generate a clear visual image through the correction of the inner optical zone and the outer optical zone (about a circular area with a diameter of 1mm to 3mm and a diameter of 5mm to 6 mm), when viewing a target object at a certain distance, the target object can be seen through the middle area (circular area with a diameter of about 3mm to 5 mm) of the optical zone 10, the brain of the wearer can select the best focal distance suitable for the near object from the depth of field range 20, so that the ciliary muscle of the wearer does not need to exert excessive force, the situation that the ciliary muscle is tensed and contracted for a long time is reduced, and the aim of effectively relieving the pressure of the eyes is fulfilled, and because the focal length in the depth of field range 20 is in a continuous variation trend, the wearer can not feel dizzy due to the sharp change of the focal length when watching the conversion of near and far objects.

Referring to fig. 6, in a continuous variable focus contact lens 1 according to a fourth embodiment of the present invention, the optical zone 10 has the first refractive power 13 at a position adjacent to the assumed central optical axis L, the optical zone 10 has the second refractive power 15 at a location remote from the assumed central optical axis L, the first refractive power 13 forms a corresponding first focal length 14 of about-1.0 m, the second refractive power 15 forms a corresponding second focal length 16 of about-1.0 m, the ADD of the depth of field 20 is 2.0, and the focal lengths within the depth of field 20 gradually decrease from the first focal length 14 to the second focal length 16 and then gradually increase, more specifically, the focal length of the first optical zone 11 (circular area with a diameter of 0.5mm to 4 mm) in the first range 21 decreases gradually, the focal length of the second optical zone 12 (circular area with a diameter of 4mm to 6 mm) in the second range 22 is gradually increased.

When the wearer is gazing at a near distance, the correction of the intermediate zone (a circular zone of about 3mm to 5mm in diameter) of the optical zone 10 allows the object to be accurately imaged on the retina to produce a clear visual image, when viewing the target object at a certain distance, the target object can be seen through the inner optical zone and the outer optical zone (circular area with a diameter of about 1mm to 3mm and a diameter of about 5mm to 6 mm), the brain of the wearer can select the best focal distance suitable for the near object from the depth of field range 20, so that the ciliary muscle of the wearer does not need to exert excessive force, the situation that the ciliary muscle is tensed and contracted for a long time is reduced, and the aim of effectively relieving the pressure of the eyes is fulfilled, and because the focal length in the depth of field range 20 is in a continuous variation trend, the wearer can not feel dizzy due to the sharp change of the focal length when watching the conversion of near and far objects.

The foregoing embodiments are merely illustrative of the present invention and are not to be construed as limiting thereof, and various changes in the numerical values or substitutions of equivalent elements are intended to be included within the scope of the present invention.

In view of the above, it will be apparent to those skilled in the art that the foregoing objects can be achieved and that the invention complies with the requirements of the patent laws and is accordingly applied to various fields.