Today approximately twenty million people are blind (visual acuity less than 3/60 [10/200]) and tens of millions more are visually disabled (visual acuity less than 6/18 [6/60]) from cataract. Most of these people live in impoverished developing nations. The logistics of providing cataract surgical care for them are complex. Simplifying the cataract operation, employing appropriate technology, and training non-physicians in intraocular surgery is efficient cost-effective strategy in many developing African nations.
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Larry Schwab (1987) studied this question.
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