Visual Fields
Visual acuity measures central vision; visual fields measure peripheral vision. Defects in the visual fields can be detected with simple screening tests or with more complex formal techniques.
A simple screening technique for detecting small, dense defects near fixation uses the Amsler Grid .
Another simple screening technique is called confrontation visual field testing.
Formal visual field testing involves the use of a bowl perimeter. Bowl perimeter testing is normally performed only by ophthalmologists and optometrists. Here is how to do formal visual field testing.
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