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contact lenses

A contact lens, mold technology, applied in glasses/goggles, optics, instruments, etc., can solve the problem of unsatisfactory wearing comfort

Inactive Publication Date: 2016-08-17
LENSWISTA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wearing comfort of this lens is not as satisfactory as expected

Method used

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Embodiment Construction

[0016] Figure 1a with Figure 1b The general shape of a contact lens is shown: the inner surface 1 facing the cornea (which in use floats over the tear film) is concave in its central portion Z (i.e., with a cone factor of approximately -0.1 to - 0.5 for a rotationally symmetric aspheric surface), thus appearing slightly elliptically pointed. In principle, the inner surface can also deviate from rotational symmetry if physiological conditions require it. The outer surface 2 of the lens is naturally convex with a radius slightly different in magnitude than that of the inner surface in order to provide the required power. In the outer peripheral portion R, the curvature or radius, respectively, deviates from the value of the middle in the following way: On the outer surface, an annular portion 4 adjoins the central portion radially, wherein said annular portion (inwardly) has a greater curvature and therefore a radius smaller. On this part, the other part adjoining it on the...

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Abstract

A hydrophilically coated silicone contact lens having a radial cross-section of the inner surface (1) of the contact lens in the edge region between the inflection point (6) and the outer edge The profile is convex (7). To make a contact lens, a silicone precursor material is introduced between a female mold and a male mold and polymerized there. The polymerized contact lens is released from the mold by a liquid that causes the lens to swell and is processed in PECVD / Contact lenses can be completed without cutting after CVD coating.

Description

technical field [0001] The present application relates to a "soft" contact lens with good wearing properties. Background technique [0002] Conventional contact lenses, such as the one known from German Utility Model Publication G 87 10 765 U1, have a radially inner portion made of a harder material and a radially outer portion made of a softer material. Its inner surface is completely concave and its outer surface is completely convex, that is, both surfaces have positive Gaussian curvature. Such known lenses are not satisfactory with regard to their wearing comfort. [0003] It is also known to apply a hydrophilic coating to contact lenses made of polymethyl methacrylate (methyl methacrylate) PMMA (US 5,080,924). However, the wearing comfort of this lens is not satisfactory as expected. Contents of the invention [0004] The object of the present invention is to provide a contact lens with good or even excellent wearing comfort and its manufacturing method. [0005] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/04B29D11/00
CPCB29D11/00057G02B1/043C08L83/04B29D11/00G02B1/00G02B1/04G02C7/04G02C7/049
Inventor 马丁·哥尔勒托马斯·廓尔迪克
Owner LENSWISTA