I have been exposed from a very little distance (couple of inches) to an external photographic flash (bigger one) directly to my eyes a couple of days ago. It blinded me instantly for a couple of seconds. When I was able to see again I saw little bit blurry with purple colour and shape of the flash still on my vision, it seems to recover now except I still feel a little discomfort in my eyes. I wonder if this might damage my eyes and if I need to worry and see my doctor?