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Why is a perimetry test (visual field testing) done?
A perimetry test can help find certain patterns of vision loss. This may mean a certain type of eye disease is present. It is very useful in finding early changes in vision caused by nerve damage from glaucoma.
Regular perimetry tests can be used to see if treatment for glaucoma is preventing further vision loss.
What do the results of a perimetry test (visual field test) for glaucoma mean?
The amount of peripheral vision loss is linked to the amount of optic nerve damage. A perimetry test makes a detailed record of your visual fields. Baseline information, descriptions, or drawings can be compared with future test results.
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