When I blink I see a clear disk in my right eye. It is surrounded by thin lines, most horizontal, some following the curve of the disk. I dissappears quickly. It s easier to see on a plain background. Previously I had horizontal lightning bolts in my upper and lower vision that quickly disappeared, too. Now I sometimes have both. I am 69 y.o., weigh 200 lbs., am diabetic, am beginning to form cataracts, no problem, to my knowledge, yet. I wear dark glasses outside. I am moderately active. I eat generally a healthy diet , with some splurges.