Erik Weihenmayer, who was already blind, successfully summited Mount Everest.
While the question "Who went blind on Everest?" could imply someone lost their sight on the mountain, the more accurate interpretation, considering the provided context, is: Who, being blind, summited Everest? The answer to that is Erik Weihenmayer.
Erik Weihenmayer: A Historic Ascent
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First Blind Person to Summit Everest: Erik Weihenmayer achieved a monumental feat by becoming the first blind person to reach the summit of Mount Everest on May 25, 2001.
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Seven Summits Completion: Erik did not become blind on Everest. He was blind before climbing and after climbing Everest. He continued his mountaineering career and completed climbing all "Seven Summits". In 2008, he also climbed Carstensz Pyramid, further solidifying his status as an extraordinary mountaineer.
