Toric lens with axis mislocation latitude
First Claim
1. A toric lens for axis mislocation correction comprising a toric lens having optical topography on at least one surface of the lens which induces a depth of field effect on the eye and enables the principle meridians of power on the lens to align with those on the eye of a wearer such that the depth of field effect compensates for mislocation error if the lens mislocates 1 degree or more, said lens being thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer.
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Accused Products
Abstract
A toric lens for axis mislocation correction has optical topography on at least one surface of the lens which induces a depth of field effect on the eye and enables the principle meridians of power on the lens to align with those on the eye of the wearer such that it compensates for mislocation error if the lens mislocates 1 degree or more. The lens is thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer. The optical topography which induces the depth of field effect may comprise either aspheric topography, spline curve functions, diffractive optics using eschelets, ion impingement or bi-refringence optics.
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Citations
20 Claims
- 1. A toric lens for axis mislocation correction comprising a toric lens having optical topography on at least one surface of the lens which induces a depth of field effect on the eye and enables the principle meridians of power on the lens to align with those on the eye of a wearer such that the depth of field effect compensates for mislocation error if the lens mislocates 1 degree or more, said lens being thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer.
- 19. An astigmatic lens which reduces axis mislocation comprising a toric lens having optical topography which induces a depth of field effect on the eye and enables the principle meridians of power on the lens to align with those on the eye of a wearer such that the depth of field effect induced by the optical topography is about plus or minus 1.5 spherical diopters to reduce mislocation error, said lens being thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer.
Specification