: MeSH: Visual Acuity

Psychological Phenomena > Mental Processes > Perception > Visual Perception > Visual Acuity

Ocular Physiological Phenomena > Visual Acuity

Diagnosis > Diagnostic Techniques and Procedures > Diagnostic Techniques, Ophthalmological > Vision Tests > Visual Acuity

Visual Acuity

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Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.

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