Wide-field high-focal-power disposable retina observation system
阅读说明:本技术 宽视场、高光焦度可抛视网膜观察系统 (Wide-field high-focal-power disposable retina observation system ) 是由 俞凌峰 V·道斯基纳 于 2018-06-19 设计创作,主要内容包括:提供了使用眼科显微镜用于眼睛的视网膜的高分辨率、广角观察的系统和方法,所述眼科显微镜可以观察使用宽视场光学系统形成的视网膜的高分辨率图像。宽视场光学系统可以包括容置在共用壳体中的第一透镜和第二透镜,所述第一透镜在至少一个表面上具有衍射表面。宽视场光学系统可以包括由光学级聚合物形成的一个或多个透镜,并且以允许透镜是可抛的成本进行制造。(Systems and methods are provided for high resolution, wide angle viewing of the retina of an eye using an ophthalmic microscope that can view high resolution images of the retina formed using a wide field of view optical system. The wide field of view optical system may include a first lens having a diffractive surface on at least one surface and a second lens housed in a common housing. The wide field of view optical system may include one or more lenses formed from optical grade polymers and manufactured at a cost that allows the lenses to be disposable.)
1. A system for high resolution, wide angle viewing of a retina, comprising:
an ophthalmic microscope having a lens arrangement for viewing an image formed by a beam of light reflected from an eye;
a front lens attachment configured to alternately move the lens holder into and out of the beam of light;
a wide field of view optical system, the wide field of view optical system comprising:
a first lens having a diffractive surface on at least one surface of the first lens;
a second lens, wherein the first lens and the second lens combine to form a substantially achromatic doublet lens; and
a common housing configured to house the first and second lenses and configured to couple with the lensholder such that, when the lensholder is positioned in a beam of light, the first and second lenses are positioned coaxially with the beam of light and allow the ophthalmic microscope to view a high resolution image of the retina of the eye.
2. The system of claim 1, further comprising:
a beam splitter in the light beam between the lens arrangement of the ophthalmic microscope and the front lens attachment.
3. The system of claim 1, wherein the wide field of view optical system has an optical power substantially equal to 128 diopters.
4. The system of claim 1, wherein the ophthalmic microscope and the wide field of view optical system resolve the retina of the eye at a viewing angle of at least 19.11 millimeters in diameter at least 10 microns μ ι η at the center of the retina and at least 20 μ ι η at the periphery of the retina.
5. The system of claim 1, wherein the first lens comprises a converging lens formed from a polymer by a molding process.
6. The system of claim 5, wherein the polymer comprises polyetherimide.
7. The system of claim 1, wherein the diffractive surface of the first lens comprises a kinoform surface having a quadratic blaze profile.
8. The system of claim 1, wherein the second lens comprises a polymer lens formed by a molding process.
9. The system of claim 1, wherein the second lens comprises a glass lens without a diffractive surface, thereby allowing liquid to come into contact with the second lens to be removed without affecting the optical prescription of the lens.
10. The system of claim 1, wherein the common housing comprises a first geometric profile for coupling with the first lens and a second geometric profile for coupling with the second lens.
11. The system of claim 1, wherein the common housing is integrally formed with the second lens and the common housing includes a geometric profile for coupling with the first lens.
12. A lens apparatus, comprising:
a first lens having a diffractive surface on at least one surface of the first lens;
a second lens, wherein the first lens and the second lens combine to form a wide field of view optical system that is a substantially achromatic doublet lens; and
a common housing configured to house the wide field of view optical system such that the first lens and the second lens are coaxially aligned when placed in a beam of an ophthalmic microscope, thereby allowing the ophthalmic microscope to observe a high resolution image of a retina of an eye.
13. The lens arrangement of claim 12 wherein the first lens comprises a polymer lens comprising a kinoform surface having a quadratic blaze profile.
14. The lens device of claim 12, wherein the common housing includes a first geometric profile for coupling with the first lens and a second geometric profile for coupling with the second lens.
15. The lens device of claim 12, wherein the common housing is integrally formed with the second lens and includes a geometric profile for coupling with the first lens.
Technical Field
The present disclosure relates to ophthalmic surgery, and more particularly to a wide field of view, high power, disposable retinal viewing system.
Background
Ophthalmic surgery is commonly performed using a surgical microscope to visualize various structures in the eye. For example, during cataract surgery, the anterior segment of the eye, such as the cornea, lens, etc., is visualized using a microscope. However, standard surgical microscopes are not sufficient to view the entire posterior segment of the eye (e.g., the retina) because the natural optics of the eye (e.g., the cornea and lens) prevent the surgical microscope from focusing on features in the posterior portion of the eye.
To achieve better posterior viewing during retinal surgery, a surgical microscope may be used in conjunction with an additional optical system capable of resolving the retinal image of the eye. For example, the contact lens of an ophthalmoscope may contain an optical system for wide-angle viewing of the retina and may be placed on a patient's eye. The surgical microscope can then be focused to view the image formed by the contact lens. However, contact lens systems can interfere with the surgeon's ability to manipulate surgical instruments. Also, the contact lenses of the ophthalmoscope may be misaligned due to patient movement.
The anterior lens attachment may also be used in conjunction with a surgical microscope to achieve wide-angle viewing of the retina. The front lens attachment may include a support member that holds the non-contact front lens over the patient's eye. However, during ophthalmic surgery, fluids from the eye and/or fluids used to maintain intraocular pressure or deliver drugs to the eye may blur the anterior lens, requiring the surgeon to wash or replace the lens.
Cleaning the contact lens and/or front lens of an ophthalmoscope can be cumbersome for a number of reasons. The process of cleaning the lens may take a period of time from the time of performing the procedure and may lead to undesirable results. Also, contact lenses and/or front lenses of ophthalmoscopes may have surface features (e.g. diffractive surface features) that make effective cleaning very difficult.
As an alternative to cleaning the anterior lens, retinal surgeons often choose to replace the anterior lens with a spare replacement lens during the procedure to ensure continuity. However, polishing a typical lens for viewing the retina at a wide angle to a high degree of accuracy is very expensive.
Disclosure of Invention
Embodiments disclosed in the present technology relate to systems and methods for high resolution, wide angle viewing of the retina of an eye. In some embodiments, a system for high resolution, wide angle viewing of the retina of an eye includes an ophthalmic microscope that can view high resolution retinal images formed using a wide field of view optical system. In some cases, the ophthalmic microscope is coupled with a front lens attachment configured to alternately move a lens holder holding the wide field of view optical system into and out of the light beam. In some embodiments, the wide field of view optical system includes one or more lenses formed from an optical grade polymer and manufactured at a cost that allows the lenses to be disposable.
Also, in some cases, the wide field of view optical system includes a first lens having a diffractive surface on at least one surface, and a second lens. In these cases, the first and second lenses may be combined to form a substantially achromatic doublet. The diffractive surface may be a kinoform (kinoform) surface with a quadratic blaze (blaze) profile. In some cases, the first lens and the second lens are both formed from an optical-grade polymer. In some other cases, the first lens having a diffractive surface is formed from an optical-grade polymer, while the second lens is formed from glass. In some embodiments, the wide field of view optical system includes a single lens formed of an optical-grade polymer, the single lens having a diffractive surface on one or more surfaces.
In some embodiments, the wide field of view optical system includes a common housing that supports the first lens and the second lens. The common housing may also be coupled with a lens holder of a front lens attachment of the ophthalmic microscope, the first lens and the second lens being positioned coaxially with the light beam when the lens holder is positioned in the light beam. The common housing may include one or more geometric features for coupling with one or more of the first lens, the second lens, and the lens holder. Also, in some cases, the common housing may be integrally formed with the first lens and/or the second lens.
In some cases, a method of high resolution, wide angle viewing of a retina may include positioning a wide field of view optical system below a lens arrangement of an ophthalmic microscope, and focusing the ophthalmic microscope to view a high resolution image of the retina of an eye, the image being resolved by the wide field of view optical system.
Drawings
For a more complete understanding of the present technology, its features and advantages, reference is made to the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates a system for high resolution, wide field of view viewing of the retina of an eye;
FIG. 2 illustrates a method of high resolution, wide angle viewing of the retina;
FIG. 3A shows an example of a wide field of view optical system that analyzes light from a human eye model;
FIG. 3B illustrates an example of a diffractive kinoform surface with a quadratic blaze profile;
FIG. 4A illustrates the quantification of eye model spot sizes formed in the intermediate plane using the independent wide field-of-view optical system described in FIG. 3A;
FIG. 4B shows the quantification of eye model pixel size in the intermediate plane using the wide field of view optical system described in FIG. 3A integrated with an ophthalmic microscope;
FIG. 4C shows the results of quantifying the modulation transfer function of the wide-field optical system depicted in FIG. 3A integrated with a microscope model;
FIG. 5A illustrates a side cross-section of a common housing for a first lens and a second lens of a wide field of view optical system;
FIG. 5B illustrates a side cross-section of a common housing that is integral with a snap fit of a wide field of view optical system or first and second lenses placed within the common housing;
FIG. 6 illustrates an example of a wide field of view optical system that resolves light from a model of a human eye;
FIG. 7A shows the quantification of eye model spot size in the intermediate plane using a single refractive/diffractive hybrid lens in the wide field of view optical system described in FIG. 6 integrated with an ophthalmic microscope; and is
Fig. 7B shows the quantification of the modulation transfer function using the single refractive/diffractive hybrid lens in the wide-field optical system described in fig. 6 integrated with an ophthalmic microscope.
Detailed Description
Systems and methods for providing a wide field of view, high optical power, and a disposable retinal viewing system are disclosed.
Fig. 1 illustrates a
The wide field of view
The
In some cases, the lens arrangement of the
Fig. 2 illustrates a
Next, the
After the first and second lenses are housed within the common housing, the
Second, the
Fig. 3A illustrates an example of a wide field of view
In some cases, one or more of the
As described above, wide field of view
The inventors have observed that a wide field of view
Referring again to fig. 3A, the
In some cases, an optical polymer that can be manufactured at low cost and sterilized for multiple uses may be selected. For example, a wide field of view
In some cases, the first lens in the wide-field optical system may be a polishable chemical-grade polymer while the second lens comprises a conventional glass lens. As described above, the first lens may include a diffractive surface that may become hazy in the presence of liquid, and may be particularly difficult to remove liquid from the diffractive surface. However, the second lens may have a smooth surface and therefore be easier to wipe clean, allowing the use, sterilization and reuse of the glass lens.
As described above, the first and second lenses in the wide-field optical system may be arranged in a common housing. In some cases, one or both of the first and second lenses are assembled in advance in a common housing or formed integrally in the common housing. In some other cases, the common housing houses geometric features for coupling with one or both of the first and second lenses.
FIG. 5A illustrates a side view cross section of a
In some cases, the
Another advantage of using optical polymers is the integration of optical and mechanical functions, thus simplifying the assembly and alignment of the wide field of view
Although the above description relates to a wide field of view optical system comprising a pair of lenses, some embodiments also relate to a single polishable optical grade polymer lens having equivalent optical power and can resolve images of the retina of an eye with equivalent high resolution in conjunction with an ophthalmic microscope. Fig. 6 illustrates an example of a wide field of view
In some cases, a single refractive/diffractive hybrid lens may be enhanced by forming diffractive kinoform surfaces on both lens surfaces. In these cases, a window may be placed between the hybrid mono-refractive/diffractive lens and the patient's eye to prevent fluid contamination of the optics.
The above-disclosed subject matter is to be considered illustrative, and not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments, which fall within the true spirit and scope of the present disclosure. Thus, to the maximum extent allowed by law, the scope of the present disclosure is to be determined by the broadest permissible interpretation of the following claims and their equivalents and shall not be restricted or limited by the foregoing detailed description.
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