Karen Green
The flashing sounds like you might be undergoing retinal detachment. If this is the case, you should IMMEDIATELY see an optometrist and ask him/her to dilate your eyes and look for peripheral tears and detachment in the retinas. A torn retina can totally detach within a few days (from what I have been told) -- you could lose your vision within a few days left untreated. I had this. They can fix this if you don't let it go too far. Please go see an optometrist today or the next day. Even if they say they are full -- press the issue -- tell them it is an emergency.