Why do you see bugs while awake?

They are known as benign "eye floaters".

In response to above:

I have the same problem but its definitely not "eye floaters." They are very real looking. Most of the time they look like tiny tan centipedes almost larva sized but they move too fast to be larva. I see them on the floor and I have to get up close to them or shut my eyes for a minute for them to go away but usually they try to scurry under things. If I keep my eyes open and watch them go under things, when I lift up what ever they went under they are gone. Its so scary that its developing into a phobia for bugs.

Before this started happening I didn't like bugs but they didn't scare me now these experiences are so traumatic that I freak out when i see ones that are there and ones that aren't there. I almost cant take seeing bugs now.

I have been looking online and some other answers seem to be drug abuse from uppers but I don't do drugs. My grandmother had Alzheimer's/dementia but I am only 21.

It doesn't happen too often and usually only when I am awake for too long but it has happened when I wasn't awake that long too so I am very confused.

If anyone else knows what's going on I would really like to know!