Visual-acuity
noun, Ophthalmology.
1.
acuteness of the vision as determined by a comparison with the normal ability to define certain letters at a given distance, usually 20 feet (6 meters).
Abbreviation: V.
visual acuity n.
Sharpness of vision, especially as tested with a Snellen chart. Normal visual acuity based on the Snellen chart is 20/20.
Read Also:
- Visual-aid
noun 1. any of various materials depending on the sense of sight, as films, slides, photographs, etc., used as aids in teaching.
- Visual allesthesia
visual allesthesia n. A condition in which visual images are transposed from one half of the visual field to the other, either vertically or horizontally. Also called optical allachesthesia.
- Visual angle
noun 1. the angle subtended by an object at the lens of the eye visual angle n. The angle formed at the retina by the meeting of lines drawn from the periphery of the viewed object.
- Visual aphasia
visual aphasia n. See alexia. Anomia. Not in technical use.
- Visual area
visual area n. See visual cortex.