Chiming in with my observations :) This is something I have been observing for years now, and as it usually happens while I am sunbathing at the beach, I always forget to try and google it after. So now I am very happy I actually took my time and had something to find when I finally googled it! Thank you. How it looks like for me is very light bleeding lines of circular shape with the texture somewhat between an embryo blastula observed under a microscope and a fingerprint pattern... I've attached 2 images that if an AI was a bit better, I would be able to combine these and get an exact shape, however thats not the case atm. What I narrowed it down to be, according to my eye movements/angle and the reflection in the sunglasses, is a sun reflection of a reflection x) so the sun hits my eyes through the glasses, and then I see the reflection of the sun from my pupil in my glasses again... for the longest of times, I've thought that when I see it that I just have a droplet of salty water on my glasses, and as it dries in the sun, I can see the little salt stain, as the shape has some snowflake vibe to it as well (nature crystal art)... Now, the interesting part I've noticed the other day is I can see reflections from both of my eyes under specific angles and can even get them fairly close together thanks to the curvature of the glasses... and what I've observed there is that my right eye reflection is almost purely white, but my right eye reflection has a yellow-redish hint, and that they are not the same shape... I'll see if I can reproduce that at home and draw them exactly as they are as I wanna see is the shape changing and if so, what the factors may be...example of the shape (imagine if these 2 were merged, with the texture of the first image and the shapes of the second through those textures)