Ophthalmic lenses with diffractive power
First Claim
1. An ophthalmic lens having positive diffractive power which introduces negative longitudinal chromatic aberration to an extent that more than counteracts the natural positive longitudinal chromatic aberration of the eye so as to provide in use a residual negative longitudinal chromatic aberration.
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Accused Products
Abstract
A contact or spectacle or implant lens has positive diffractive power which introduces negative longitudinal chromatic aberration that more than counteracts, and is preferably greater than twice, the natural positive longitudinal chromatic aberration of the eye. The residual negative longitudinal chromatic aberration enables the eye/brain system to perform tasks by concentrating on the appropriate color component at the different respective distances without need to accommodate.
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Citations
17 Claims
- 1. An ophthalmic lens having positive diffractive power which introduces negative longitudinal chromatic aberration to an extent that more than counteracts the natural positive longitudinal chromatic aberration of the eye so as to provide in use a residual negative longitudinal chromatic aberration.
Specification