Novel rigid gas permeable cornea contact lens

A contact lens and rigid technology, applied in glasses/goggles, optical components, instruments, etc., can solve the problem of unsatisfactory positioning of rigid contact lenses, and achieve the effect of increasing centering and increasing stability

Inactive Publication Date: 2011-01-19
北京京德嘉润视觉科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hard contact lenses are usually only placed in the conjunctival cavity of the cornea and scleral limbus, and directly adhere to the upper and lower palpebral conjunctiva and cornea. Due to the irregularity of the human cornea, the positioning of various hard contact lenses on the cornea is not ideal. status

Method used

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  • Novel rigid gas permeable cornea contact lens
  • Novel rigid gas permeable cornea contact lens
  • Novel rigid gas permeable cornea contact lens

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0023] Such as Figure 1-4 As shown in , a novel rigid gas-permeable contact lens includes a peripheral arc 2 of the lens 1, and is characterized in that: the inner edge of the peripheral arc 2 of the novel rigid contact lens is provided with two symmetrical stabilizing wing areas 3 or three stabilizing wing areas 3; the distance D between the inner and outer ends of the stabilizing wing area 3 is 0.2-7mm; the concave inner arc surface of the stabilizing wing is conical arc, spherical arc or aspheric arc.

[0024] The three stabilizing wing areas 3 are equidistantly or unequally distributed along the inner edge of the peripheral arc area 2; each of the stabilizing wing areas 3 is 1 / 6-1 / 3 of the inner edge; the three stabilizing wing areas The shape and size of the zones can vary.

[0025] The inner arc surface 4 of the stabilizing wing is a conical...

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Abstract

The invention discloses a novel rigid gas permeable cornea contact lens, comprising a peripheral arc of the lens. The lens is characterized in that the inner rim of the peripheral arc of the contact lens is provided with two symmetric stable pterions or three stable pterions, wherein the distance of inner top end and outer top end of the stable pterion is between 0.2 and 7mm; the inside arc surface of the stable pterion can be a conical arc with an arch bottom angle of between 20 and 40 degrees; the inside arc surface of the stable pterion can be a spherical arc with the radius of curvature of between 6 and 25mm; the inside arc surface of the stable pterion can be a non-spherical arc, the difference of curvature radiuses of the starting point and the finishing point of the non-spherical arc is between 0 and 1mm, and the curvature radius of the starting / finishing point is between 6 and 25mm; and the inside arc of the stable pterion can be single arc or multi-arc which is a single multi-arc or combined multi-arc of the conical arc, the spherical arc or the non-spherical arc. The structure of the lens improves the stability and the centralization of various lenses in cornea, so that various cornea contact lenses can achieve the state that the comfort state is more comfortable, and the eyesight is more perfect.

Description

technical field [0001] The invention relates to a corneal contact lens, in particular to a novel rigid air-permeable corneal contact lens. Background technique [0002] Compared with soft contact lenses, hard contact lenses not only improve the oxygen permeability, but also ensure the firmness of the material, and have good wettability and anti-precipitation. Its effect on the control and correction of juvenile true myopia and keratoconus has been clinically verified by ophthalmologists at home and abroad for many years, and has been affirmed. At present, hard contact lenses are usually only placed in the conjunctival cavity of the cornea and scleral limbus, and directly adhere to the upper and lower palpebral conjunctiva and cornea. Due to the irregularity of the human cornea, the positioning of various hard contact lenses on the cornea is not ideal. status. Contents of the invention [0003] The purpose of the present invention is to address the above problems and prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/04
CPCG02C7/04G02C7/048
Inventor 陈迪生
Owner 北京京德嘉润视觉科技股份有限公司
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