The uvea is the vascular layer of the eye beneath the sclera , consists of three structures: the iris , the ciliary body and choroid , forming a pigment layer. Also it called cover half of the eyeball , vascular tunic and uveal tract.
The iris, the colored ring that surrounds the black pupil , opens and closes like the lens of a camera. The ciliary body is the set of muscles that widen the lens so that the eye can focus on nearby objects and that makes it thinner when focusing the more distant. The choroid is the inner lining of the eye that extends from the end of the ciliary muscles to the optic nerve , located at the back of the eye.
Inflammation of the uvea is called uveitis .
- Uvea The University of Florida Health System – Shands Healthcare.