Diabetes can affect oneÕs eyes in many different ways. Some people just come in for a diabetic eye exam and they donÕt really have any symptoms at all Ð everythingÕs fine. But they should get checked once a year to make sure theyÕre not developing a problem. Some patients come in because theyÕve had a big change in their glasses prescription and they need that adjusted. ItÕs not unusual for people with diabetes (particularly ones that have sugar thatÕs pretty poorly controlled) to have rather dramatic swings in their prescriptions.