Vitreous
The vitreous humor (Latin corpus vitreum ) is a component of the eyes of vertebrates and belongs to the so-called middle eye segments in anatomy and ophthalmological diagnostics . To maintain the shape of the eyes, they contain a gel- like, transparent substance, the vitreous humor. The vitreous body lies between the lens and the retina . As a result, the light collected by the lens traverses the vitreous humor on its way to the retina. The vitreous body consists of around 98% water and around 2% hyaluronic acid and a network of collagen fibers (<< 1%). The mentioned fine, three-dimensional network of collagens consists primarily of collagen type II and IX. The association of hyaluronic acid in this wide-meshed network and the high capacity of hyaluronic acid to bind water determine the homogeneous, gel-like consistency of the vitreous body and its transparency .
The so-called blood-eye barrier is used to protect the vitreous .
Diseases
Vitreous diseases are:
- Persistent hyperplastic primary vitreus
- Vitreous detachment
- Vitreous hemorrhage
- Vitreous destruction
- Vitreous inflammation
- Synchisis scintillans , a sparks from cholesterol deposits
- Vitreous opacity
Web links
See also
literature
Theodor Axenfeld (founder), Hans Pau (ed.): Textbook and atlas of ophthalmology. With the collaboration of Rudolf Sachsenweger and others 12th, completely revised edition. Gustav Fischer, Stuttgart et al. 1980, ISBN 3-437-00255-4 .