Ads
related to: corneal topography diagram printable template free images
Search results
Results From The WOW.Com Content Network
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Corneal topography, also known as photokeratoscopy or videokeratography, is a non-invasive medical imaging technique for mapping the anterior curvature of the cornea, the outer structure of the eye. Since the cornea is normally responsible for some 70% of the eye's refractive power , [ 1 ] its topography is of critical importance in determining ...
Diagnosis is most often by topography. Topography measures the curvature of the cornea and creates a colored "map" of the cornea. Keratoconus causes very distinctive changes in the appearance of these maps that allow doctors to make the diagnosis. Initially, the condition can typically be corrected with glasses or soft contact lenses. [3]
Simultaneous stereo fundus photos have been published prior to 1909 however their use as a diagnostic tool is not widespread. [16] Recent advances in digital photography and 3D monitors has seen some manufacturers incorporating it once again into photographic equipment.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate
The brightness of the Purkinje images can be determined using Fresnel's equation: = (′) / (′ +), where and ′ are the refractive indices before and after the reflecting surface. Purkinje image P1 is the brightest of the four, then P3 and P4 (P3 and P4 have about the same brightness), then P2.
[1]: 321 It lies in the corneal epithelium. Usually it has about 0.5 mm in thickness and is 1–2 mm long. It is generally horizontal, with possible mild downward trend in the middle. It is present normally in people over the age of 50, but seems to dissipate to some degree by the age of 70.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more