Hi! For some time now I've been having split-second flashes of light in the outer corner of my eye. It usually happens in my left eye, but I ocasionally see in the right eye, but not at the same time. It happens at night or when it gets darker, when I'm watching the TV or when I'm in bed. I don't know when it first started because I didn't pay attention to it and I thought it was because of my shortsightedness. But one day I went on Google... And now I'm convinced I have brain tumor or eye tumor. At first I thought about retinal tear but I have not seen an increase in floaters, a shadow over my vision, or distorted vision. I'm extremely scared. I have to wait a few days for an appointment but I'm sure the doctor will find something seriously wrong :(