I have been having trouble off and on with my right eye. It feels like there is something in it or pressure behind it. There feels like a dark spot over it and sometimes when I look away from something I can still see a image in mt vision. kind of like when you see a flash go off and turn away and still have it. These things happen off and on, sometimes dont have them and then other days i have them everyday. Does this just sound like aging eyes or having a mini stroke everyday? Hope someone can help please?