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Test: Visual Field Test

Visual field testing (perimetry) is used to check the whole area that each eye can see (the visual field). The development of blank sections in the visual field may be caused by various underlying disorders (see Visual field defects). Many eye disorders cause characteristic visual field defects that can develop without being noticed. Testing allows early detection and treatment.

Visual field test

One eye is covered while you look at a central target inside the test bowl. When you see lights flashing in different parts of your visual field, you press a response button.

Results

Visual field map

The blue area here represents the area of visual loss in the normal field of vision.

From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.

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