V
VISUAL ACUITY
The capacity of the eye to see a specific object height from five meters away. It is expressed in tenths: 1/10 (low vision), 10/10, etc. |
VISUAL CORTEX
The part of the brain devoted to vision. |
VISUAL FATIGUE
The sense of reduced visual performance, not necessarily caused by excess work. |
VISUAL FIELD
The entire area that can be perceived by an immobile eye. |
VISUAL PIGMENT
The photosensitive pigment found in the outer segments of receptor cells. The pigment in rods is rhodopsin. |
VISUAL REEDUCATION
A set of techniques used with subjects who have vision deficiencies to enable them to regain at least partial use of their visual faculties. |
VITREOUS HUMOUR
This largely gelatinous liquid fills the entire part of the eyeball located behind the crystalline lens. It has the ability to cushion impacts. (see EYE) |
|
|