Patent ID: 7377637

Claim:
A kit for fining a hybrid contact lens, comprising: a first contact lens having a substantially rigid zone with an aspheric surface defined by a first base curve having a first apical radius extending from a first point and a first conic constant, the first base curve having a contour that deviates from a sphere centered on said first point and having a radius equal to the first apical radius by a first amount, the first contact lens also having a substantially flexible portion coupled to the substantially rigid zone; and a second contact lens having a second substantially rigid zone with an aspheric surface defined by a second base curve having a second apical radius extending from a second point and a second conic constant, the second base curve having a contour that deviates from a sphere centered on said second point and having a radius equal to the second apical radius by a second amount, the second contact lens also having a second substantially flexible portion coupled to the second substantially rigid zone; wherein (i) the first and second amounts are substantially the same and (ii) the first and second apical radii of the respective first and second contact lenses are different.