So maybe this board knows the answer because i don't know how to explain it enough for google to understand, it links me to "floaters and flashes" but that's not it.

Pic related

Today i was sitting on my yard, sunlight was somewhat strong, and i was real calm watching the distance, specifically a floor of sorts of old material, didn't think much about it, and then i "squinted" my eyes -for a lack of a better explanation".

Then started to see pic related, if you see closer you will see little purplish particles, but contrary to the JPG they moved, not all of them, but they did, and the ones that did moved REAL FAST, and in a way like you would expect from the atomic model. If i stopped squinting they kind of disappear, is there an explanation for this ?