"The sparkly bits seem like a different symptom. It could be related to migraine-perhaps worth a chat with your GP. Your symptoms may respond to a change in diet-the usual culprits being cheese, red wine and coffee"
Most unlikely. Gingernut. OBK, EvilTwinRating and Lose Rivets are giving a textbook descriptionof an entoptic phenomenon - vide supra. Its a natural phenonemon of little concern. Don't tell your AME of these visual sensations - he'll be flummoxed as well.