In a video below that tiny specks we usually see has a named, and they go by a scientific name"muscae Volitantes" which commonly known "flying flies " from Latin language.But, they are not real flies or kind of bug.
Muscae Volitantes or "eye-floaters are usually bit of tissue,protein or red blood cells that exists inside our eyeballs. We see them every time they cast shadow on the retina, they appear every time we look on the bright side, such as computer screen.
source: Elite readers
Watch the video: