Cornea

Cornea
Schematic diagram o the human ee shawin the cornea as separatit frae the sclera bi the corneal limbus
Vertical section o human cornea frae near the margin. (Waldeyer.) Magnified. Epithelium. Anterior elastic lamina. substantia propria. Posterior elastic lamina (Descemet's membrane). Endothelium of the anterior chamber. a. Oblique fibers in the anterior layer o the substantia propria. b. Lamellæ the fibers o which are cut across, producin a dottit appearance. c. Corneal corpuscles appearin fusiform in section. b. Lamellæ the fibers o which are cut longitudinally. d. Transition tae the sclera, with more distinct fibrillation, an surmoontit bi a thicker epithelium. e. Smaw bluidvessels cut athort near the margin o the cornea.
Identifiers
MeSH	D00331
Dorlands /Elsevier	c_55/12259559
TA	A15.2.02.012
FMA	FMA:58238
Anatomical terminology [eedit on Wikidata]

The cornea is the transparent front pairt o the ee that covers the iris, pupil, an anterior chamber. The cornea, wi the anterior chamber an lens, refracts licht, wi the cornea accoontin for approximately twa-thirds o the ee's tot optical pouer. In humans, the refractive pouer o the cornea is approximately 43 dioptres. While the cornea contreibutes maist o the ee's focusin pouer, its focus is fixed. The curvature o the lens, on the ither haund, can be adjuistit tae "tune" the focus dependin upon the object's distance. Medical terms relatit tae the cornea eften stairt wi the prefix "kerat-" frae the Greek wird κέρας, horn.