MEDICAL PROCEDURES
Visual Field Test
What is a visual field test?
A visual field test is a method of measuring an individuals entire scope of vision. Visual field testing actually maps the visual fields of each eye.
What is a visual field test used for?
Visual field testing is used to detect any early (or late) signs of glaucoma damage to the optic nerve and/or damage to the retina.
How is visual field testing done?
There are a variety of methods of measuring the visual fields. A crude visual field test can be done by having the patient look straight ahead and count the fingers shown by the examiner from the side. More typically, however, visual fields are measured by a computerized assessment in a optometrist's or ophthalmologist's office. For this procedure, one eye is covered and the patient places his or her chin in a type of bowl. Then, when the patient sees lights of various intensities and at different locations, he or she pushes a button. This process produces a computerized map of the visual field.
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