Spatial Vision

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Abstract
This review is concerned with the visual mechanisms - optical, photochemical, and neurophysiological - underlying the observed behavior in psychophysical studies on this topic. There are discussions of scope, viewpoint, and basic conceptions, spatial resolving power of the visual system (including foveal visual acuity: target and field variables; optical variables, legibility of letters, suprathreshold tasks, acuity theory), the effect of area and retinal location upon visual functions (including thresholds and acuity, chromatic discriminations, and moving targets), space-time interaction, neural interaction and contrast effects (including physiological studies and psychophysical studies), discrimination and recognition of form (including selection of forms for study, criteria of similarity, search for significant independent variables, influence of "traditional" variables,.search for neurophysiological mechanisms of form discrimination, and pattern recognition by machine). There are 233 references.