Lens in contact with sclera

Abstract

The invention provides a lens in contact with sclera, which comprises a convex outer surface and a concave inner surface, the inner surface is provided with a central area for correcting vision, a transition area arranged on the periphery of the central area and a landing area arranged on the periphery of the transition area, the landing area is provided with a contact part for being in contact with the sclera. The inner surface is designed into a continuous curved surface with a preset shape based on the rise, the rise is obtained based on the rise depth of the eyeball, the rise of the inner surface is gradually reduced from the center of the central area to the contact part, the rise of the inner surface is larger than the rise depth of the eyeball in the central area, and the rise of the inner surface is equal to the rise depth of the eyeball in the contact part; The landing area comprises a corneal limbus landing area not making contact with the cornea and a sclera landing area making contact with the sclera through the contact part, and the rise of the contact part gradually decreases from inside to outside in a linear mode. According to the present disclosure, it is possible to provide a lens which can be well matched with a sclera and which can uniformly disperse the pressure borne by the sclera.

Description

[0001] This application is filed on July 22, 2020 , the application number is 202010712536.1 , the name of the invention is sclera Mirrors and their dispensing methods divisional application of the patent application. technical field [0002] The present disclosure relates to a lens that contacts the sclera. Background technique [0003] Contact lenses can correct the refractive error of the eyeball. The commonly used hard contact lenses are directly in contact with the cornea and worn on the cornea. However, since the cornea is rich in sensory nerve cells and is a relatively sensitive part of the human body, wearing a hard contact lens directly on the cornea can easily cause foreign body sensation or other symptoms of incompatibility, and these symptoms are very important for people with corneal diseases ( For example, patients with keratoconus, dry eye, etc. will be more serious. In addition, for patients with abnormal corneal refractive error, it is difficult to ob...

AI Technical Summary

Problems solved by technology

[0005] However, most of the existing scleral lenses have an arch-bridge landing on the sclera, which can easily lead to uneven contact between the scleral lens and the sclera, resulting in uneven contact pressure on the sclera, and the scleral lens itself is relatively thick, which can easily lead to conjunctival staining and other complications. Symptoms

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