Recently I my physician casually checked my eyes with smartphone light pointing at my sides of eyes(pheriperal)....after that,in my pheriperal vision I had seen dark black spots irregular in shape....after 15mins or so ,,again I checked they are gone.....what may be the reason and is it normal????....recently I consulted opthalmologist (before this incident)...he said my eyes are good(not dialated exam)....