Abstract

The development of ophthalmic lenses in the last few years is characterized by the use of aspheric surfaces for a flattering of base curve and by the use of high refractive index materials. The design of aspheric lenses allows a good control of peripheral monochromatic aberrations. Recent studies (Simonet et al., 1992; Gresset et al., 1993) have shown that oblique astigmatism and mean oblique power error are generally not greater than ±0.50D for an ocular rotation of 300. However such a dioptric defocus affects visual performance measured by contrast sensitivity function (Charman, 1979; Marmor and Gawande, 1988).

© 1993 Optical Society of America