I was sitting in an airport waiting for a plane & both eyes started “fogging” up. I bought eyedrops flushed them out. Slowly but surely as time went by I could not see, it was as if I had a curtain over my eyes, I could only see light. I went to my ophthalmologist & she said nothing was wrong with my eyes, she recommended a cardiologist. Eventually I did regain all my vision. The cardiologist determined I had a TIA. I had never been to a cardiologist prior to this event.