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Orthokeratology contact lens

A technology of contact lenses and corneas, applied in glasses/goggles, optical components, instruments, etc., can solve problems such as shortening the course of treatment

Inactive Publication Date: 2007-03-28
董晓青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Although the lenses of U.S. Patent No. 5,963,297 to Dr. Reim have made great progress, orthokeratology still needs to continue to improve its myopia reduction, shorten the course of treatment, and prolong the time to maintain clear vision

Method used

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  • Orthokeratology contact lens
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Examples

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Embodiment Construction

[0019] The following detailed description is of the best mode to date of carrying out the invention. The content of this article is only a principled example illustration for the present invention, and is not limited to the described scope. It is the appended claims that are the scope of the invention.

[0020] 1 to 3 illustrate a contact lens 10 for orthokeratology according to the present invention. In FIG. 1 , the contact lens 10 is a reverse geometric lens, which is specially designed to be worn on the cornea 12 of the patient's eyeball 14 . The contact lens 10 has five arcs, from the center to the outside: an optical area 20 , an assembly arc 22 , a facilitating arc 24 , a fitting arc 26 , and an edge arc 28 .

[0021] optical zone

[0022] Optic zone 20 has a curvature determined by base arc 30 . Optic zone 20 may exert pressure on the central region of cornea 12, flattening the central corneal curvature and lengthening the radius of curvature.

[0023] The radius o...

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Abstract

A contact lens is fitted to a cornea of a patient's eye to gradually alter the patient's cornea during continued wear to reshape the cornea to reduce the hyperopia and / or presbyopia condition. The contact lens has a plurality of zones that includes one or two optical zones, a plateau zone, a fitting zone, an alignment zone and a peripheral zone. The one or more optical zones are utilized to redistribute cornea tissue to cause the cornea to have a steepened central portion surrounded by a flat mid-peripheral ring The plateau zone helps steepening the central cornea by two ways: a positive molding effect of pushing the cornea tissue inward to pile up and a negative molding effect to flatten the mid-peripheral cornea for enhancing.

Description

technical field [0001] The present invention relates to a contact lens for treating myopia, and more particularly, to a contact lens with a special shape design that can gradually change the shape of the wearer's cornea to reduce the degree of myopia. Background technique [0002] There are many causes of poor vision. The most common vision problem is so-called nearsightedness. Nearsightedness cannot see distant objects clearly. Focus correctly on the retina. Another factor is farsightedness. Farsightedness cannot see near objects clearly because the cornea is too flat (the radius of curvature of the cornea is too long), or the front and rear diameters of the eyeball are too short to focus correctly on the retina. Another common problem is astigmatism. Astigmatism is caused by the uneven curvature of the corneal surface. The multi-refractive surface cannot be fully focused, resulting in blurred vision. [0003] Once myopia is formed, there is no way to completely treat an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/04
CPCG02C7/047
Inventor 董晓青
Owner 董晓青
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