After squatting for a long time, I suddenly had a dark eyes. What was going on?Maybe this factor is "doing things"

I believe many people will encounter this situation ------After squatting for a lo...

In front of me, there are "little worms" and black shadows float around. Is it a sign of blindness?

If you have floating little worms, black shadowWith a blink of an eyeLooks like a variety ofSilk -shaped, dotted, stripThe quantity or less ...Many people may worry aboutWill this be a precursor to