Floater
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Details
Floaters are deposits of various size, shape, consistency, refractive index, and motility within the eye's vitreous humour, which is normally transparent. They may be of embryonic origin or acquired due to degenerative changes of the vitreous humour or retina. The perception of floaters is known as myodesopsia, or less commonly as myiodeopsia, myiodesopsia, or myodeopsia. Floaters are visible because of the shadows they cast on the retina or their refraction of the light that passes through them, and can appear alone or together with several others in one's field of vision. They may appear as spots, threads, or fragments of cobwebs, which float slowly before the sufferer's eyes. Since these objects exist within the eye itself, they are not optical illusions but are entoptic phenomena. One specific type of floater is either called Muscae volitantes (from the Latin, meaning 'flying flies'), or mouches volantes (from the French), and consist of small spots. These are present in most people's eyes and are attributed to minute remnants of embryonic structures in the vitreous humour.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130291846
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Größe H220mm x B150mm x T5mm
- Jahr 2010
- EAN 9786130291846
- Format Fachbuch
- ISBN 978-613-0-29184-6
- Titel Floater
- Untertitel Refractive index, Motility, Eye, Vitreous humour, Embryo, Visual perception, Retina, Visual field, Optical illusion, Entoptic phenomenon, Blue field entoptic phenomenon, Phosphene
- Gewicht 136g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 80
- Genre Sozialwissenschaften allgemein
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