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Design method of optical glasses for correcting tubular vision

A tubular field of view and optical glasses technology, applied in optics, optical components, glasses/goggles, etc., can solve problems such as visual field defects, high surgical risks, and visual field damage, so as to reduce the inconvenience of movement, increase the visual range, Improved visual effects

Inactive Publication Date: 2018-09-11
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If the retinal photoreceptor cells, especially the rod cells and / or ganglion cells, are damaged, the corresponding visual field defect can be gradually caused, and in severe cases, a tubular visual field can be formed, and this visual field damage is irreversible. It is possible to reverse the defective visual field. At present, there is no method in the world to reverse the defective visual field
The method of trying to expand the visual field by lowering the intraocular pressure through surgery is risky and cannot guarantee the patient's vision recovery, and it is difficult to determine the extent to which the intraocular pressure of the patient can be reduced after the operation, and it is impossible to judge whether it will improve the visual field Effect
So far, there is no non-destructive physical method to expand the visual field of patients with tubular vision

Method used

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  • Design method of optical glasses for correcting tubular vision
  • Design method of optical glasses for correcting tubular vision
  • Design method of optical glasses for correcting tubular vision

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Taking non-contact lenses as an example, a non-contact lens is designed for patients with normal vision and tubular vision. The aperture is set to 1.2mm, corresponding to the incident light of 3.5°. Its structure is as figure 1 As shown, wherein, 1 represents the designed lens, 2 represents the cornea, 3 represents the anterior chamber, 4 represents the lens, 5 represents the vitreous body, and 6 represents the retina. The optical parameters of the non-contact lens 1 designed according to the above steps are shown in Table 2. Among them, R is the radius of curvature of the front surface, α 2 is the second-order coefficient of the front surface, α 4 is the fourth-order coefficient of the front surface, n is the refractive index of the lens, R' is the radius of curvature of the back surface, α 2 ′ is the second-order coefficient of the rear surface, α 4 ' is the fourth-order coefficient of the back surface, d is the thickness of the lens, and D is the semi-aperture o...

Embodiment 2

[0057] Taking non-contact lenses as an example, another non-contact lens was designed for patients with normal vision in tubular vision. The lens is designed with a different refractive index material than that of the first non-contact lens in Example 1. The aperture is still set to 1.2mm, corresponding to the incident light of 3.5°. Table 4 shows the optical parameters of another non-contact lens 2 designed, where R is the radius of curvature of the front surface, α 2 is the second-order coefficient of the front surface, α 4 is the fourth-order coefficient of the front surface, n is the refractive index of the lens, R' is the radius of curvature of the back surface, α 2 'is the second-order coefficient of the rear surface, α 4 ' is the fourth-order coefficient of the rear surface, d is the thickness of the lens, and D is the semi-aperture of the lens. The parameters in formula (1) are shown in Table 4 (the formula expression is omitted). According to the parameters in th...

Embodiment 3

[0064] In addition, the present invention takes a contact lens as an example, and designs a contact lens for tubular vision patients with normal vision. The aperture is set to 1.8mm, and the corresponding field of view is about 5.5°. Structural diagram such as Figure 5 As shown, 1 represents the designed lens, 2 represents the cornea, 3 represents the aqueous humor, 4 represents the lens, 5 represents the vitreous body, and 6 represents the retina. The optical parameters designed according to the above steps are shown in Table 6, where R is the radius of curvature of the front surface, α 2 is the second-order coefficient, α 4 is the fourth-order coefficient, n is the refractive index of the lens, d is the thickness of the lens, and D is the semi-aperture of the lens. According to the parameters in the table, a lens suitable for correcting the patient's tubular visual field can be manufactured. The parameters in formula (1) are shown in the data in Table 6 (the formula exp...

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Abstract

The invention relates to an optical method for correcting a tubular visual field. The method comprises the steps that by means of eye axis data of actual human eyes and combination of a Gullstrand-LeGrand eye optical model, a personalized eye model according with human eye optical properties is constructed by means of optical design software; aspheric surface type setting is conducted on a lens, optimization is conducted on a whole lens-eye optical system in different view fields respectively, and a field angle according with direct sight of normal eyes is obtained. By means of the optical method for correcting the tubular visual field, the problem of the tubular visual fields of patients with late-stage glaucoma and primary retinal pigment degeneration can be solved, the visual fields of the patients are expanded, and the problem that the patients walk difficultly due to the vision tubular form is solved.

Description

technical field [0001] The invention belongs to the technical field of tubular visual field correction, in particular to the technical field of expanding the visual field of patients with advanced glaucoma caused by retinal ganglion cell damage and primary retinitis pigmentosa caused by retinal photoreceptor cell damage. Background technique [0002] With the improvement of living standards and the advancement of science and technology, the average life expectancy of human beings continues to increase. Most countries have gradually entered an aging society, and my country has also entered an aging society. Due to the control of infectious eye diseases, ophthalmic degenerative and degenerative diseases have become prone to and common diseases in the elderly, especially glaucoma: pathological high intraocular pressure leads to apoptosis or even death of retinal ganglion cells, which leads to optic nerve degeneration The visual field of patients with advanced glaucoma often pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/02G02C7/04
CPCG02C7/027G02C7/04
Inventor 梁艳梅邢沐悦汪建涛
Owner NANKAI UNIV
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