This is obviously for the best. Anyone who has had serious surgery to their eye(s) should be very careful before making a decision to start boxing. Detatched retinas are a much more common injury than the sport's statistician's would care to reveal...even in the amateur ranks I boxed with guys who had this happen to them.
As far as having blurry vision goes, one of my old instructors had pretty bad eyesight without his glasses and I recall him telling me that when he was young and training hard he would often only see a big blurry shape in front of him when sparring full contact, so he would just go nuts and pummel the blur. He actually thought it gave him a bit of an edge because although he might not have been as precise as others were, he was instilled with a tiny bit of panic due to his eyesight and this made him pretty ferocious in the ring.