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Hard corneal contact lens for high hyperopia correction

A contact lens and high hyperopia technology, applied in glasses/goggles, optics, instruments, etc., can solve problems such as the difficulty of removing lenses, achieve the effects of shortening the treatment time of amblyopia, preventing amblyopia, and improving the cure rate of amblyopia

Pending Publication Date: 2021-04-30
周籽秀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although RGP solves the problems existing in the correction of frame glasses, but because the lenses are both positive lenses, both RGP and frame glasses can form a clear object image in the center of the retina, the imaging of the middle periphery is located in front of the retina, and the imaging shell is only in the retina. The central area is anastomosed, it is difficult to remove the lens

Method used

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  • Hard corneal contact lens for high hyperopia correction
  • Hard corneal contact lens for high hyperopia correction

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as Figure 1-Figure 2 As shown, a rigid contact lens for high hyperopia correction includes a lens 1. The lens 1 includes an integrally formed central optical zone 11, a peripheral optical zone 12 and an edge arc zone 13. The central optical zone 11 is located at the center of the lens 1. The peripheral optical zone 12 is set around the central optical zone 11, and the edge arc zone 13 is set around the peripheral optical zone 12; the central optical zone 11 is a positive lens that meets the diopter of the patient's eyeball, and the peripheral optical zone 12 is a negative lens. The outer surface is spherical or aspheric, the outer surface of the negative lens is aspheric, and the outer surface of the lens 1 is aspheric. Specifically, the outer surface of the peripheral optical zone 12 of the present invention is an aspheric surface, that is, the eccentricity of point A on the outer surface of the peripheral optical zone 12 is different from the eccentricity of poi...

Embodiment 2

[0039] The same features of this embodiment and embodiment 1 will not be repeated, and the different features are:

[0040] In this embodiment, the peripheral optical zone 12 in this embodiment begins to gradually defocus outside the half-chord length of the lens 1 of 3.5 mm, so as to form hyperopic defocus in the peripheral retina.

[0041] The thickness at the center of the lens 1 in this embodiment is 0.20mm.

[0042] The inner surface of the lens 1 in this embodiment is an aspheric surface, which has a good fit with the eyeball 2 and better comfort.

[0043] The diameter of the central optical zone 11 in this embodiment is 6.1 mm.

[0044] The arc width of the edge arc region 13 in this embodiment is 0.7 mm.

Embodiment 3

[0046] The features identical to those of Embodiment 1 or 2 will not be repeated in this embodiment, but the different features are:

[0047] In this embodiment, the peripheral optical zone 12 in this embodiment begins to gradually defocus outside the half-chord length of the lens 1 of 4 mm, so as to form hyperopic defocus in the peripheral retina.

[0048] The thickness at the center of the lens 1 in this embodiment is 0.25mm.

[0049] The diameter of the central optical zone 11 in this embodiment is 6.2mm.

[0050] The arc width of the edge arc region 13 in this embodiment is 0.9 mm.

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Abstract

The invention discloses a hard corneal contact lens for high hyperopia correction which comprises a lens body, the lens body comprises a central optical area, a peripheral optical area and an edge arc area which are integrally formed, the central optical area is located in the central area of the lens body, the peripheral optical area is arranged around the central optical area, and the edge arc area is arranged around the peripheral optical area; wherein the central optical area is a positive lens conforming to eyeball refraction brightness of a patient, the peripheral optical area is a negative lens, the outer surface of the positive lens is a spherical surface or an aspheric surface, the outer surface of the negative lens is an aspheric surface, and the outer surface of the lens body is an aspheric surface. By wearing the hard cornea contact lens, a high-hyperopia child patient can obtain clear and stable vision, amblyopia is prevented, and the amblyopia cure rate is increased; when the glasses are worn, hyperopia defocus can be formed on the peripheral retina, so that the development of the eye axis of a high hyperopia child patient is promoted, the amblyopia treatment time is shortened, and the lens removal rate is increased.

Description

technical field [0001] The invention relates to the technical field of medical vision correction, in particular to a rigid contact lens for high hyperopia correction. Background technique [0002] Childhood is a critical period for visual development. Refractive errors in children are the common cause of amblyopia. Amblyopia is a common eye disease that affects children's vision. Hypermetropia is an important cause of amblyopia in children. If it is not treated in time, it will cause visual development. The impairment causes amblyopia. Therefore, timely and effective optical correction in children can prevent the occurrence of amblyopia and improve the cure rate of amblyopia. [0003] At present, clinical correction methods for children with high hyperopia mainly include: wearing frame glasses and wearing daily rigid contact lenses (RGP). When wearing frame glasses with positive lenses to correct high hyperopia, there are problems such as thick lenses, mismatched mirror ce...

Claims

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Application Information

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IPC IPC(8): G02C7/04G02C7/02
CPCG02C7/021G02C7/044
Inventor 周籽秀林文宾李思珍杨庆松徐姗姗赵娜毕凡杨晓冬
Owner 周籽秀
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