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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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