lets analyze
Before any conclusion lets check all possibilities:
1 - floaters - i have them, they look like little cells and since i was 10 years old they are same format and are present in my vision all the time (physical)
2 - light dot sparks - i got them i guess 2 times in my life, they looks like very shining light dots hundreds of them for a second or two, happened when i woke up after doing exercises, (lack of oxygen in brain)
3 - light flash, very weird light flash when i was closed eyes praying in a church, i thought someone was kidding me with a camera but nobody around occurred just once in all my life (i really dont know what was that)
4 - tiny light dots moving in random directions (million), i can see always when looking to a bright surface or to the blue sky. they looks like microorganisms, i can follow them in their random pats for about 1/5 of second and them they disappear, their paths are like "S", the paths do not repeat. I am not convinced they are blood vessels because paths do not repeat, also they are millions.
Now for all skeptic people: read the "Plato Cave Myth", do not be blind to the unknown before trying to understand what it really is
Regards for all people