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visual acuity

the degree of clarity, or sharpness, of visual perception. It may be measured in several ways; for example, by testing one’s ability to detect very small gaps between two parts of a figure (the minimum separable method), or to discern a fine dark line on a light background or a fine light line on a dark background. See also acuity grating; Landolt circles; Snellen chart.

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Psychology term of the day

June 19th 2024



n. in infants, lack of psychomotor response or failure to gain weight or produce purposeful behavior, often thought to be a response to separation from mothers and subsequent institutionalization. See also reactive attachment disorder.