Toric lens with orientation wave forms
First Claim
1. A contact lens having an optic zone and an outer radial planar zone, the lens comprising an array of contours which are defined by at least one waveform comprising crests and troughs on at least one of the back and front surfaces of the lens, said at least one waveform providing means to enable proper location and orientation of the lens on the eye of a wearer by interaction between said lens, said eye and an eyelid and allowing sufficient gas transmission through said lens.
1 Assignment
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Accused Products
Abstract
An improved contact lens (1) having an optic zone (4) and a radial planar zone (5) such that the radial planar zone has an array of contours which are defined by a waveform or waveforms (2, 3) comprising crests and troughs on the back and/or front surface of the lens. The waveform(s) provide(s) means to enable proper location and orientation of the lens on the eye of a wearer by interaction between the lens, the eye and an eyelid and facilitating increased gas transmission through the lens.
41 Citations
22 Claims
- 1. A contact lens having an optic zone and an outer radial planar zone, the lens comprising an array of contours which are defined by at least one waveform comprising crests and troughs on at least one of the back and front surfaces of the lens, said at least one waveform providing means to enable proper location and orientation of the lens on the eye of a wearer by interaction between said lens, said eye and an eyelid and allowing sufficient gas transmission through said lens.
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22. A contact lens having an optic zone and an outer radial planar zone, the lens comprising at least one waveform, each waveform comprising crests and troughs on at least one of the back and front surfaces of the lens, said at least one waveform providing means to enable location and orientation of the lens on the eye of a wearer by interaction between said lens, said eye and an eyelid and allowing sufficient gas transmission through said lens, each of said waveforms being located only in said outer planar zone and having a plurality of alternating turns between the ends of the waveform.
Specification