I have read numerous cases about how people who have learned to relax their eyes have regained their eyesight. Alot of kids lose their eye sight when they go to school because they are taught to focus on certain things, and the furthest thing they look at is the blackboard or book. I have also heard that kids lose their eye sight when something traumatic happens.
When a person has multiple personalities their eye sight changes with each personality. Some of the personalities can have better than 20/15 eye sight while others have very poor vision.
I also know of people who have thrown away their glasses, and trust only in God to show them what they need to see have regained their eye sight.