Method of making contact lens

摘要: An uncut contact lens of resilient, self-restoring plastic material having a central or base spherical curve is ground to provide surrounding annular peripheral greater radius curvature than the curve. The finish for particular cornea by first warping preselected diametral axis so that projection periphery on plane normal visual elliptical. While maintained in this warped condition, grinding tool selected diameter applied coaxially with as grind curve, whereby removed depth and width from at ends minor ellipse, progressively less direction away toward major axis. Upon completion grinding, released self-restores its unwarped which condition becomes toric.