Chocobo

Member 4461

Level 13.07

Apr 2006

|
Jun 5, 2006, 08:52 AM
Local time: Jun 5, 2006, 01:52 PM
|
#4 of 45
|
|
Originally Posted by eriol
Wait a minute, sometimes I saw transparant things like that when I gazing. Do you think I suffer one too? how to test them? 
|
Look at the blue sky in a clear day like today (at least here), it looks like semi transparent things floating in your eyes and they follow your eyes motion so wherever you look in the sky they are there. Thier shape is variable too, but let me quote wikipedia.
|
Quote:
Floaters are suspended in the vitreous humour, the thick fluid or gel that fills the eye. Thus, they generally follow the rapid motions of the eye, while drifting slowly within the fluid. Floaters located slightly to the side of one's direction of gaze can be particularly annoying. When they are first noticed, the natural reaction is to attempt to look directly at them. However, attempting to shift one's gaze toward them can be difficult since floaters follow the motion of the eye, remaining to the side of the direction of gaze. Floaters are, in fact, visible only because they do not remain perfectly fixed within the eye. Although the blood vessels of the eye also obstruct light, they are invisible under normal circumstances (and thus not annoying) because they are fixed in location relative to the retina, and the brain "tunes out" stabilized images (see neural adaptation). This does not occur with floaters and they remain visible, and, in some cases when large and numerous, very annoying.
Floaters are particularly noticeable when lying on one's back and gazing at blue sky. Despite the name "floaters", many of these specks have a tendency to sink toward the bottom of the eyeball, in whichever way the eyeball is oriented; the supine position tends to concentrate them near the fovea, which is the center of gaze, while the textureless and evenly lit sky forms an ideal background against which to view them.
|
EDIT: Original wiki article here http://en.wikipedia.org/wiki/Floaters
How ya doing, buddy?
|