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The area in space that may be visualized
by the eye is known as the visual field. Plotting of the visual
field is important for many disorders, particularly disorders
of the optic nerve and brain. This would include glaucoma
(an optic nerve disorder), strokes, and brain tumors. Patients
often incorrectly assume that because they can see their hand
waving off in the periphery, their peripheral vision is fine.
However, testing peripheral vision with such a gross test
as a waving hand is likely only to be useful for the most
severe losses of peripheral vision, as sometimes occurs in
stroke. The much more common and subtle peripheral vision
deficits may only be detected by the sophisticated methodology
of a computerized visual field analyzer. This device systematically
plots the field of vision using threshold testing, which allows
the determination of retinal sensitivity in any given location.
The ophthalmologist then interprets the results. A visual
field analyzer is most often used to evaluate and follow patients
with suspected or actual glaucoma.
At Ahalia, we have the Humphery Visual Field analyzer, which
is the latest & top of the line Perimeter. Visual field
testing is a painless OPD procedure & takes around 15
mins.
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