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Mark Breazzano, MD, is a practicing ophthalmologist and ophthalmic researcher.
Mark Breazzano, MD, is a practicing ophthalmologist and ophthalmic researcher.

How vitamin A deficiency can affect vision

Vitamin A deficiency is a leading cause of blindness in developing countries, but also of increasing concern in developed countries, including the United States. Mark Breazzano, MD, explains why and what can be done about it. He is an assistant professor of ophthalmology and visual science at Upstate.

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