Toric lens with axis mislocation latitude

Details Toric lens with axis mislocation latitude Toric lens with axis mislocation latitude

G - Physics

02

C

G02C 7/04 (2006.01)

Patent

CA 2115343

2115343 9303409 PCTABS00019 A toric lens for axis mislocation correction having optical topography on the surface/s of the lens which induces a depth of field effect on the eye and enables the axis of powers on the lens to align with those on the eye of the wearer such that it neutralises 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 comprises either aspheric topography, spline curve functions, diffractive optics using eschelets or bi-refringence optics.

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