I have these little suckers pretty bad. I guess it sucks getting older and falling apart! They look like little black dots that move on their own inside the eye, and always in the line of vision. At times, they can make the edge of the ball bend and appear squiggly. Anyhow, I think there is a surgery for them, but it's too spendy for me.
Here's what they look like:
http://www.gotfloaters.com/
Here's what they look like:
http://www.gotfloaters.com/