Optical Design of the Asphero-Iseikonic Posterior Chamber Intraocular Lens

Abstract

The optical design and results of the asphero-iseikonic posterior chamber intraocular lens (IOL) have been reported. Based on the optic theory and calculations, the iseikonic IOL was achieved in the Chinese schematic eye, which is a plano-convex optic with the convex surface to the retina and attached to the lens loops angulated 13° from the anterior plano surface. Then, using computer ray-tracing in the wide-angle model of the eye, the best equation of the aspherical curve for the posterior surface of the IOL was achieved at different visual field angles with various entrance pupils. Results showed that the performance of the aspherical IOL was better than that of the conventional spherical plano-convex IOL with the convex surface toward the retina or cornea and obviously also better than the biconvex IOL. Despite a 12° visual angle, the optical resolution was more than 100 line pairs/mm.