Ariel Helwani broke the news, on FUEL TV's "UFC Tonight."
"After the fight against Alan Belcher, Michael Bisping completely lost all peripheral vision in his right eye," said Helwani. "He went to see an eye on doctor on Tuesday and he found out that he had a detached retina. On Thursday, he had surgery to fix the detached retina. He’s hoping to return to the UFC in October."