I had what I’d consider a flashing flower looking shape in the lower right field of view of my left eye back in March. It was only visible in bright light, like outdoors in full sunlight. I just so happened to have an annual eye exam within a week of noticing it and my optometrist referred me to a retinal specialist. I had a retinal detachment that had apparently been there for a few months based on the color. I had surgery a week later, a scleral buckle. They cut the white of your eye, and put a silicone zip tie around the eyeball to keep the retina from detaching further. The way the surgeon explained my reitnal, it’s like trying f to wallpaper a room that is just slightly larger than the amount of wallpaper you have, so the edges pull away. The buckle changes fhe shape of the eye by making it more egg shaped than round.
I’d definitely get it checked out and keep an eye (no pun intended) on it. They told me it’s much easier to prevent vision loss than to try and get it back. My Rx changed a lot so now I’m no longer nearsighted in that eye. I’m in my early 40s, most of the people in the waiting room were 65+ by the looks of them.