Fluid vision?

This might be weird, but sometimes i can see the fluid infront of my eye, it appears as little circles and lines. I'm positive its the fluid because when i turn my eyes in a certain direction they move as well, and when i stop moving them, the shapes continue to move under momentum for a bit. I've checked my eyes in the mirror and theres nothing "visably" there, and im pretty positive its not from sun exposure or bright lights. Does any1 else get this, or is it just me?

You are seeing a floater. Because they are inside your eye, they move with your eyes when you try to see them. You may also see flashes of light. These flashes occur more often in older people, and usually are caused by mechanical stimulation of photoreceptors when the gel-like vitreous occasionally tugs on the light-sensitive retina. You can often see them when looking at a plain background, like a blank wall or blue sky. Floaters are actually tiny clumps of gel or cells inside the vitreous, the clear jelly-like fluid that fills the inside of your eye.Floaters may look like specks, strands, webs or other shapes. Actually, what you are seeing are the shadows of floaters cast on the retina, the light-sensitive part of the eye.

Those are aqueous floaters in the aqueous fluid in your eye.
A doctor can see them as he explores your eye with an ophthalmoscope. Almost everybody gets them. They are usually no problem.

I usually see that when I look at the sky. Little moving clear balls. I'm young though. My vision is fine. So I wouldn't say there's a problem. It might be natural, since I went to an optometrist and he didn't see anything.