Aging of visual mechanisms

Abstract

Optical and neural changes in the aging human visual system are reviewed in terms of factors that can influence the study of light-mediated effects on circadian physiology. All aspects of early stage visual mechanisms change continuously from the first days of life, and these changes must be understood when investigating both conscious and unconscious visual responses to light throughout the life span.

Keywords: Aging; Human vision; Lens absorption; Photopic sensitivity; Pupil; Scotopic sensitivity; Spatial vision; Temporal vision.