Contrast sensitivity and light adaptation in photoreceptors or in the retinal network

Robert M. Shapley, Ehud Kaplan, and Keith P. Purpura

In: Contrast Sensitivity, R. Shapley and D. M-K Lam, eds., pp 103-116, MIT Press, Cambridge, MA. (1993)

Introduction

Sensitivity to contrast is one of the most important attributes of the visual system of humans and other animals. This chapter is about some of the reasons for the dependence of visual responses on contrast and about the neural machinery in the retina that makes it possible.