Patent ID: 8057034

Claim:
A kit comprising at least two contact lenses: wherein said contact lenses each comprise a central optical zone, at least one peripheral optical zone, and at least one blending region; wherein said central optical zone provides a first corrective factor to, the first corrective factor power for affecting central refraction of an eye when fitted on the eye; said peripheral optical zone providing a second corrective factor to control the position of peripheral image points; and said blending region residing between adjacent central optical zone and peripheral optical zones to provide mechanical and geometrical continuity between adjacent zones; and wherein, each said contact lens provides a different first corrective factor and a different second corrective factor; and wherein the second corrective factor controls the position of said peripheral points so as to be suitable for optimizing contrast sensitivity of an eye at said peripheral image points; wherein, for each said contact lens, said peripheral image points comprise an image point at 30 degrees temporal field and the refractive power of the second corrective factor at 30 degrees temporal field is non-zero and approximately two-thirds of a refractive power of the first corrective factor.