@Jaylee, I detest those background lit eye charts I can't even read the top row. The technicians murmur and have a look of utter sympathy. One day they are going to pat my head and say there, there. I have triple vision and the glow of the white lit background completely engulfs the letters. In bright light I too have the smudge across my central vision, as if someone has wiped a greasy finger across my glasses. None of mine is to do with blood sugars though, at least I hope not.