William Horatio Bates (December 23, 1860 – July 10, 1931) was an American physician who practiced ophthalmology and developed what became known as the Bates method for better eyesight. The method was based in his theory that the eye does not focus by changing the power of the lens, but rather by elongating the eyeball through use of the extraocular oblique muscles; this model contradicted mainstream ophthalmology and optometry then and now.
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