Abstract

Presbyopia is a visual condition where the eyes' lenses have crystallized, and the eyes can no longer accommodate.^1,2 A progressive addition lens (PAL) is a multifocal lens meant to give the presbyope clear vision at a range of viewing distances.^3-5 Progressive addition lenses have a change in power from the upper (distance) region to the lower (near, or reading) region. ⁶ A power-gradient example for a typical PAL is shown below. ⁷ In this research, the design of progressive addition lenses via a gradient-index of refraction is considered.

© 2002 Optical Society of America