The Lens and Accommodation
(1) University of Sydney, Sydney, Australia The Lens Overview 1. Structure The lens is a biconvex, transparent structure located behind the iris (Fig. 4.1). Fig. 4.1 The lens and…
The Primary Visual Cortex
(1) University of Sydney, Sydney, Australia Overview The primary visual cortex (V1) receives visual information from segregated magnocellular, parvocellular, and koniocellular channels of the lateral geniculate nucleus (LGN) [1,…
Luminance Range for Vision
(1) University of Sydney, Sydney, Australia Overview 1. Mechanisms that broaden our luminance range for vision Our visual system can function over a wide range of light intensities, from…
Visual Electrophysiology
(1) University of Sydney, Sydney, Australia Overview Visual electrophysiology is the recording of electrical signals produced by the visual system. It allows assessment of the entire visual pathway, from…
Visual Acuity
(1) University of Sydney, Sydney, Australia Overview Visual acuity (VA) is a measure of keenness of sight. It is a relationship between the size of a stimulus and visual…
Binocular Single Vision and Stereopsis
(1) University of Sydney, Sydney, Australia Overview: The Physiology of Binocular Vision Binocular vision is obtained from two retinal images that are fused through motor and sensory processes culminating…
Neural Control of Eye Movements
(1) University of Sydney, Sydney, Australia Overview 1. Eye movements: functional domains and control systems A diverse range of eye movements is required for the visual system to function…
Ocular Circulation
(1) University of Sydney, Sydney, Australia Vascular Anatomy of the Eye (Fig. 11.1) Fig. 11.1 Blood supply of the eye Two separate vascular systems supply the eye: (i) The…
The Optic Nerve
(1) University of Sydney, Sydney, Australia Overview (Fig. 12.1) Fig. 12.1 The optic nerve. (a) Structure. (b) Divisions The optic nerve is a central nervous system (CNS) white matter…
Color Vision
(1) University of Sydney, Sydney, Australia Overview Color is a subjective sensory phenomenon, not a physical attribute of an object. Color perception arises from stimulation of cones by light….
