Soft contact lens having toric rear face and rotationally symmetrical front face
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United States of America Patent
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Oct 3, 1995
Issued Date -
N/A
app pub date -
Dec 22, 1994
filing date -
Apr 23, 1992
priority date (Note) -
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Abstract
The soft toric contact lens has a substantially rotationally symmetrical front face optionally having a rotationally symmetrical lenticular construction, and a substantially aspherical, especially ellipsoidal, rear face. The optically active central region of the rear face is toric. Shifting the torus to the central region of the lens rear face results in lenses that are economic to produce, are of wearable thickness and are straightforward to fit.
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