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Vertigo: An abnormal sensation of rotation or spinning movements of an individual, object, or environment in any plane of motion.

Visual acuity: The ability and degree to which an individual can recognize detail at various distances.

Visual field: The portion of the viewing area that can be perceived by an individual without turning their head, irrespective of acuity.

Visuospatial functioning: The ability of an individual to recognize unique temporal spatial features.