Affiliation:
1. Istituto Nazionale di Ottica, Largo Enrico Fermi 6, 50125 Arcetri-Firenze, Italy
Abstract
The visual system operates under automatic controls through a number of servo systems. Among other effects, we note that the visual depth of focus may increase when the eyelid invades the pupil area. The difficulties met in trying to account for this finding by classical optics are reviewed.
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics