chapter  7
Seeing a3-D World
Pages 40

The visual world consists of surfaces extending away into the distance, and solid objects resting on them at different distances and with their surfaces inclined differently towards us (Figure 7.1). In addition, the pattern of light reaching the retina is never static. The eyes, heads, and bodies of observers move, and objects and animals in the scene being viewed also move. In this chapter we consider some of the optical information available to animals which allows them to perceive the layout of surfaces and the distances of objects, and we consider the mechanisms in the brain that may serve to analyse and represent that information.