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Visual field defect
- ... Your responses help determine if you have a defect in your visual field. Both tests are often used to track conditions ...
- ... The disorder can be caused by several genetic defects. The cells ... affecting about 1 in 4,000 people in the United States.
- ... medicines Vitamin A deficiency (rare) Nontreatable causes: Birth defects, particularly congenital stationary night blindness Retinitis pigmentosa
- ... it is caused by a virus, a gene defect, or both. Environmental ... world where MS is more common (areas further from the equator).