Ryeowook revealed that he only put on his glasses around people who he was close with.
Super Junior were guests on JTBC's 'Knowing Brothers'. Ryeowook's question about himself was for the 'Knowing Brothers' cast to guess what he did when he felt like he was close with someone. Heechul guessed correctly that it was to put his glasses on, and Ryeowook confessed, "I have really bad eyesight. My eyesight is -7.5." He put his glasses on to show as an example turning his image into a completely different one. Even the other 'Knowing Brothers' members tried out the glasses.
Did you watch the episode?
I love this man very much. He looks good with or without his glasses., but with his bad eyesight, he should be wearing them more often. I worry about him, and his eyesight, and I don't want him to lose his eyesight as he gets older.