Nutritional blindness
Japan (1993) Umetaro Suzuki (1874-1943) vitaminologist.

Suzuki was a noted vitaminologist. He noticed that a component of rice bran was effective
             in preventing beriberi. He was the first to discover aberic acid, now called vitamin B1, in rice bran. 
He later succeeded in isolating vitamin B1. His other success included isolating and 
extracting vitamin A from cod liver oil. Vitamin B1 deficiency causes corneal 
epithelial changes, ophthalmoplegia, nystagmus, optic atrophy. Wernicke's 
encephalopathy and Korsakoff's encephalopathy are neurological 
manifestations of vitamin B1 deficiency.

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