ANATOMICALLY ACCURATE, FINITE-MODEL EYE FOR OPTICAL MODELING

There is a need for a schematic eye that models vision accurately unde r various conditions such as refractive surgical procedures, contact l ens and spectacle wear, and near vision. Here we propose a new model e ye close to anatomical, biometric, and optical realities. This is a fi nite model with four aspheric refracting surfaces and a gradient-index lens. It has an equivalent power of 60.35 D and an axial length of 23 .95 mm. The new model eye provides spherical aberration values within the limits of empirical results and predicts chromatic aberration for wavelengths between 380 and 750 nm. It provides a model for calculatin g optical transfer functions and predicting optical performance of the eye. (C) 1997 Optical Society of America.