Has anyone ever experienced flashes of light in the outer corner of their eye? I see them when I turn over in bed, when I yawn, bend over, turn my head.. not every time, but sometimes. Also when I walk from from light to dark, and the other way around. I see one flash in one eye at a time. They're driving me crazy. I'm so scared it's because of a brain tumor... I've seen those flashes for 2 months now, every single day. I went to two eye doctors and both said my eyes are healthy. I also went to a neurologist and after examining my reflexes, coordination, etc. she also said I'm healthy. I'm thinking of getting an MRI... I'm really scared 