17-1403

visual acuity

1. qualitatively: capacity for seeing distinctly fine details that have very small angular separation

2. quantitatively: any of a number of measures of spatial discrimination such as the reciprocal of the value of the angular separation in minutes of arc of 2 neighbouring objects (points or lines or other specified stimuli) which the observer can just perceive to be separate

Equivalent term: "visual resolution"

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