Oct. 2, 2013
Forty million people worldwide live in total darkness and 90 percent of them live in the developing world.
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However, three out of four such cases are reversible, according to Dr. Geoffrey Tabin, director of the division of international ophthalmology at the John A. Moran Eye Center.
Tabin spends a large part of the year traveling around the world restoring sight to thousands of people with cataract blindness.
ABC News joined him on a recent trip 8,000 miles from Tabin’s home in Park City, Utah, to Ethiopia, which has one of the highest rates of blindness in the world.