تعريف visual field في الإنجليزية الإنجليزية القاموس.
The area or extent of space visible to an eye in a given position of gaze The central visual field is directly in front and the target at which we are looking The peripheral visual field is that which we perceive in our "side vision" The fields of each eye partly overlap
The entire area which can be seen without shifting the gaze It is a measure of the peripheral vision There are different instruments to determine the visual field in the eye clinic
The space or range within which objects are visible to the immobile eyes at a given time. Also called field of vision
The normal field of vision is about 140 degrees for each eye (monocular vision) and about 180 degrees for both eyes (binocular vision) Coloboma can reduce the field of vision
That part of the world around an individual can see while looking straight ahead Normally, the visual field is determined more precisely by checking each eye individually to test for blind spots Such blind spots could signify glaucoma-related damage to the retina or optic nerve
all of the points of the physical environment that can be perceived by a stable eye at a given moment
Extent of space visible to an eye as it looks (fixates) straight ahead Measured in degrees away from fixation See Free Eye Tests
The area of vision to the side when one is looking straight ahead Defects in the sensitivity of the peripheral vision can be helpful in diagnosing many types of visual and general health conditions
The entire area that can be seen when the eye is forward, including peripheral vision
The entire area that can be seen when the eye is looking straight ahead, including peripheral side vision
field of vision; the entire expanse of space visible at a given instant without moving the eyes
The entire area that can be seen by the eye, including front and side, or peripheral, vision
Blind spot (scotoma) or area in the normal field of vision. It may be persistent or temporary and shifting, as in a migraine aura. The field may narrow, as in glaucoma. The normally small blind spot corresponding to the point where the optic nerve enters the eye can enlarge if fluid accumulates at that point (papilledema). Methanol or quinine poisoning, diseases of the nerve sheaths, deficiency diseases, and atherosclerosis can also cause blind spots. Tumours pressing on the optic nerves in different locations can cause loss of different halves or quarters of the visual field of each eye. See also macular degeneration