Ophthalmology in MLB has evolved: Teams who once shunned prospects who wore glasses now use EEGs to track what hitters see and when.
“Hitters have three tenths of a second on a 90 mph pitch to make a decision,” says Keith Smithson, the Nationals’ team optometrist. “If we can buy a tenth in there somewhere, we gain the ability to foul it off if we were gonna miss it or put it in play if we were gonna foul it off.”
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Apstein, S. (2015, April 23). MLB teams focus in on enhancing players’ visual training. Retrieved April 19, 2016, from http://www.si.com/edge/2015/04/21/seeing-the-benefit-mlb-vision-training-tampa-bay-rays#