Seeing black dots as if one is seeing flies across the eye?

Question

What is the cause of it? I see that one dot flying in front of my right eye for years now. I heard that's normal as long as it doesn't get worse. My friend has it also.

What is the cause of it? Do you also have them?

Answer 1

is it a single dot? You are probably just seeing the blind spot caused by the optic nerve as there are no photoreceptors there. When both eyes are open it's a little less common to see it. It is true to keep an eye on it and get it checked if it gets larger or more pronounced.

Answer 2

Sounds like a floater to me.  Floaters are little pieces of your eye that break off and then float around in the liquid in your eye.  Sounds dangerous, but they are normal, as long as you don't notice a whole lot of them at once.  A lot of people have them and they can look different to different people: large or small, grey or clear, squiggles or dots.

Your blind spot would not fly across your eye or look like a dot.  Your eye fills in the missing area.

Answer 3

“muscae volitantes” (flying flies).

The classic floater.

It's the vitreous gel inside the eye being marginally less than uniform, causing a shadow or a bright spot, (sometimes one within the other)

They are very common, tend to increase as you get older, and short-sighted people tend to have more.  They are almost always harmless, though any sudden change  (more floaters, flashing lights) needs to be checked out professionally, because just 2% of such sudden episodes are early retinal detachments, and that's worth being ruled out, rather than "waiting to see what happens".

With a refraction getting up to -13.50, I have hordes of the things.