While it is a "routine" procedure, there's a slim chance that something may go wrong, like getting an infection in that eye. Ask me how I know. I was sent to a retina specialist, and he said that if I had waited another day, I woulda lost sight in that eye. The infection can come from the surgeon, the hospital staff, or even yourself, so although it is a slim chance ( 1 in 700) it can happen.