Eight-Axis Visual-Field Mapping for Targets Embedded in a Homogeneous Competing Background

Abstract

The binocular functional visual field for a detection task, with a peripherally presented target embedded in a homogeneous competing background, was mapped on 8 axes passing through the fixation point. The boundary of the field for each axis was based on the number of “correct” responses on the axis, where a “correct” response was defined in terms of the size of the error made by the subjects in estimating the target position. The visual fields for 6 subjects (4 men and 2 women) were very irregular in shape, and there were differences among subjects. The 8-axis area correlated highly with area based on only the horizontal and vertical axes but the latter area gave no indication of even gross irregularities in shape of the visual field.

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