Corneal shaping lens

A technology of orthokeratology lenses and corneas, applied in glasses/goggles, optics, instruments, etc.

Pending Publication Date: 2018-02-23
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 orthokeratolo

Method used

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Examples

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Embodiment Construction

[0052] 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.

[0053] 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:

[0054] (1)

[0055] 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.

[0056] 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 corneal shaping lens. The corneal shaping lens comprises an inner surface facing the human cornea during wearing and an outer surface opposite to the inner surface, whereinthe inner surface comprises a base curve area located in the center, the base curve area is used for pressing the front surface of the cornea and shaping the front surface of the cornea to be consistent with the base curve area and comprises two or more areas, and the at least two of the areas have different curvature radii.

Description

technical field [0001] The present invention relates to orthokeratology lenses, and more particularly to orthokeratology lenses having more than one radius of curvature in the base arc region. 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 corr...

Claims

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Application Information

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IPC IPC(8): G02C7/04
CPCG02C7/045G02C7/049
Inventor 王曌解江冰
Owner EYEBRIGHT MEDICAL TECH BEIJING
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