I started seeing flashes of white light just in the far outer edge of my left eye. It comes and goes but is frequent. My neurologist referred me to an optometrist who specializes in ocular surface disease, dry eyes and glaucoma. I've seen her twice and she has done tests and assured me that my retina is intact but there are some issues with my eyes. She asked me if I wanted glasses and I said I have not needed them since my cataract surgery some years ago when artificial lens were implanted. When I read your question I wondered about why I could get glasses but you can't. I don't think my lens are "multi-focall" so maybe that is the difference. Now I am wondering why I was referred to and optometrist instead of an ophthalmologist (although she does research and works for the Wilmer Eye Institute which is associated with Johns Hopkins.