I'm not really sure if his brothers wear glasses or not, but for the purpose of this fic, they don't.
Disclaimer: Ouran doesn't belong to me...yet...
Kyouya
Few people know this, but Kyouya does not truly need glasses. He started wearing them at a young age to distinguish him from his brothers. Somehow, this self-inflicted imperfection, comforted the perfectionist in him. It was a constant reassurance that he wasn't the same as his brothers, and therefore could surpass them. Over the years, he had grown dependent on the two pieces of useless glass more than he knew he should. Ironically, by the time he didn't need the glass to prove that he was different, because the host club, he knew, saw through him, he needed them for his vision.