The gradient index and spherical aberration of the lens of the human eye

We present equations for analysing the primary spherical aberration of the crystalline lens, both as a whole and of its contributing parts. We apply t hese equations to two examples of gradient index lenses. The spherical aber ration of one lens is well outside that expected for real lenses, but that of the other is within this range. We assess the sensitivity of the aberrat ion to changes in surface shape and gradient index distribution. The proces s is applicable to other models of the gradient index of the lens. (C) 2001 The College of Optometrists. Published by Elsevier Science Ltd. All rights reserved.