Abstract

Aspheric lens design is recognized as the preferred method of reducing aberrations, minimizing magnification and ring scotoma, enhancing peripheral vision, and making high plus (over +10.00D) powered ophthalmic and aphakic lenses thinner and lighter weight. Aspheric lenses have progressively flatter curvature towards the lens periphery and can be categorized by the degree of asphericity or amount of "drop". Higher degrees of asphericity emphasize wider visual fields and minimizing the ring scotoma while lower asphericity lenses emphasize peripheral acuity and minimize distortion. In general, aspheric design improves the off axis performance of any high plus lens by reducing aberrations. The use of aspheric lenses also results in flatter, thinner and lighter weight lenses.

© 1993 Optical Society of America