I have a black spot in my left eye only that appears when i blink and quikly fades. I can also notice it if i run my finger infront of my eye really close its as if it only appears with contrast. Im scared its damage from over exposure to some bright light because thats what the spot reminds me of. Its been like this for 8 months at least I cant pinpoint when it started but its really annoying. Any ideas what it is or how to fix it?