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Method for manufacturing orthokeratology lenses

A technology of orthokeratology lenses and corneas, applied in glasses/goggles, optical components, instruments, etc., to achieve the effect of convenient eye treatment

Active Publication Date: 2020-05-12
EYEBRIGHT MEDICAL TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently there is no orthokeratology lens that can correct presbyopia

Method used

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  • Method for manufacturing orthokeratology lenses
  • Method for manufacturing orthokeratology lenses
  • Method for manufacturing orthokeratology lenses

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Embodiment Construction

[0074] The following specific examples are only used to further explain the present invention, but the present invention is not limited to the following specific embodiments. Any changes based on these embodiments will fall within the protection scope of the present invention as long as they conform to the spirit and scope of the principles of the present invention.

[0075] The refractive state of the cornea is mainly determined by its radius of curvature. In actual clinical application, the commonly used conversion relationship between the radius of curvature of the cornea and the diopter of the cornea is:

[0076] (1)

[0077] Among them, K is the diopter of the cornea in D, R is the radius of curvature of the front surface of the cornea in mm, and n is the refractive index of the cornea. For example, n can be 1.3375.

[0078] Such as figure 1 As shown, the orthokeratology lens includes an inner surface IS facing the cornea of ​​a person's eye when worn, and an outer...

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Abstract

The invention relates to a method for manufacturing an orthokeratology lens. The orthokeratology lens comprises an inner surface facing cornea of the human beings when in wearing and an outer surfaceopposite to the inner surface, wherein the inner surface comprises a basic arc area disposed at the center. The method comprises the following steps: determining a maximum curvature radius of the basic arc area; determining a presbyopia correction amount for a wearer; determining a minimum curvature radius of the basic arc area; and manufacturing the orthokeratology lens, so that the basic arc area comprises two or more regions, a first region in the two or more regions has the maximum curvature radius, and the second region of the two or more regions has the minimum curvature radius. The orthokeratology lens manufactured according to the method of the invention can play a role in correcting ametropia and presbyopia.

Description

technical field [0001] The present invention relates to a method for manufacturing orthokeratology lenses. Background technique [0002] Presbyopia is a visual problem that will inevitably appear after people enter middle age and old age. As the age increases, the ability of the eye to adjust gradually declines, which causes the patient to have difficulty seeing near, so that in close work, a convex lens must be added to the static refraction correction to have clear near vision. This phenomenon is called presbyopia. With the improvement of modern people's living standards, especially when women who love beauty reach middle age, their requirements for image are increasing day by day. It's getting serious. At present, presbyopia is mainly solved by wearing presbyopic glasses, surgery, and wearing multifocal contact lenses. There are problems in the convenience, correction effect, and correction stability of external reading glasses or contact lenses worn during the day, es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/04
CPCG02C7/047
Inventor 王曌解江冰
Owner EYEBRIGHT MEDICAL TECH BEIJING
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