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During a routine comprehensive eye exam, your optometrist may want to perform a Visual Field Assessment to assess the full horizontal and vertical range and sensitivity of your vision. In other words, Visual Field Assessments are used to detect blind spots (scotomas), which could be a sign of eye diseases. The size and shape of a scotomas offer important clues about the presence and severity of diseases of the eye, optic nerve and visual structures in the brain.


Many of these eye or brain disorders can cause peripheral vision loss and other visual abnormalities. Brain abnormalities such as those caused by strokes or tumours can affect the visual field. In fact, the location of the stroke or tumor in the brain can frequently be determined by the size, shape, and site of the visual field defect.

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