Abstract

Coddington's can be used to eliminate the oblique astigmatic error in the design of ophthalmic lens of spherical or other conicoidal surfaces. But it is difficult to do the same way to the nonconic aspheric ophthalmic lens design. In this paper we will present an efficient approach based on optimization of aspheric coefficients which enable the design program to obtain the minimum aberrations. Many high order coefficients of aspheric surfaces can easily result in inflection point, which increases difficulty in manufacturing. We solved the problem in the optimization as a target. The design of nonconic aspheric ophthalmic lens could obtain spectacle lenses well thinner in thickness and well flatter in shape than spherical ophthalmic lens and other conicoidal ophthalmic lens. In this paper, we use damping least square meathod to design aspherical myopia ophthalmic lenses, aspheric hyperocular lenses and cataract lenses. Design examples are given and comparisons are made.

© 1998 Optical Society of America