Floater

Floaters or eye floaters are sometimes-visible deposits (e.g., the shadows of tiny structures of protein or other cell debris projected onto the retina) within the eye's vitreous humour ("the vitreous"), which is normally transparent, or between the vitreous and retina. They can become particularly noticeable when looking at a blank surface or an open monochromatic space, such as a blue sky. Each floater can be measured by its size, shape, consistency, refractive index, and motility. They are also called muscae volitantes (Latin for 'flying flies'), or mouches volantes (from the same phrase in French). The vitreous usually starts out transparent, but imperfections may gradually develop as one ages. The common type of floater, present in most people's eyes, is due to these degenerative changes of the vitreous. The perception of floaters, which may be annoying or problematic to some people, is known as myiodesopsia, or, less commonly, as myiodaeopsia, myodeopsia, or myodesopsia. It is not often treated, except in severe cases, where vitrectomy (surgery) and laser vitreolysis may be effective. Floaters are visible either because of the shadows that imperfections cast on the retina, or because of the refraction of light that passes through them, and can appear alone or together with several others as a clump in one's visual field.…

Floaters or eye floaters are sometimes-visible deposits (e.g., the shadows of tiny structures of protein or other cell debris projected onto the retina) within the eye's vitreous humour ("the vitreous"), which is normally transparent, or between the vitreous and retina. They can become particularly noticeable when looking at a blank surface or an open monochromatic space, such as a blue sky. Each floater can be measured by its size, shape, consistency, refractive index, and motility. They are also called muscae volitantes (Latin for 'flying flies'), or mouches volantes (from the same phrase in French). The vitreous usually starts out transparent, but imperfections may gradually develop as one ages. The common type of floater, present in most people's eyes, is due to these degenerative changes of the vitreous. The perception of floaters, which may be annoying or problematic to some people, is known as myiodesopsia, or, less commonly, as myiodaeopsia, myodeopsia, or myodesopsia. It is not often treated, except in severe cases, where vitrectomy (surgery) and laser vitreolysis may be effective. Floaters are visible either because of the shadows that imperfections cast on the retina, or because of the refraction of light that passes through them, and can appear alone or together with several others as a clump in one's visual field. They may appear as spots, threads, or fragments of "cobwebs", which float slowly before the observer's eyes, and move especially in the direction the eyes move. As these objects exist within the eye itself, they are not optical illusions but are entoptic phenomena (caused by the eye itself). They are not to be confused with visual snow, which is similar to the static on a television screen, although these two conditions may coexist as part of a number of visual disturbances which include starbursts, trails, and afterimages.

Epidemiology

A vitreous detachment typically affects patients older than the age of 50 and increases in prevalence by age 80. Individuals who are myopic or nearsighted have an increased risk of vitreous floaters. Additionally, eyes with an inflammatory disease after direct trauma to the globe or have recently undergone eye surgery have an increased chance of developing a vitreous floater. Men and women appear to be affected equally.

In other animals

It has been theorized that non-human animals are capable of seeing floaters, as most mammals have anatomically similar eye structures to humans. However, floaters in animals are capable of damaging their vision. Animals with synchysis have an increased risk for retinal detachment and may also require surgery.

References

External links

Text derived from https://en.wikipedia.org/w/index.php?oldid=1375874788 under CC BY-SA 4.0; modifications have been made.