uveo-, uve- +
(Latin: grapelike; the uvea, the [grapelike] surface of the iris of the eye)
It is usually caused by the presence of micro-organisms.
The injured eye is termed the "exciting eye". If the affected eye is not removed within ten days of the accident that caused the wound, blindness will occur.
The iris is the circular, colored curtain of the eye that surrounds the pupil.
The choroid of the eye is the thin vascular middle layer of the eye that is situated between the sclera (the white of the eye) and the retina (the nerve layer that lines the back of the eye, senses light, and creates impulses that travel through the optic nerve to the brain).
The ciliary body is the body of tissue that connects the iris with the choroid and includes a group of muscles which act on the lens of the eye to change its shape.
The word uvea comes from the Latin word uva for "grape". One suggested idea behind this strange relationship to the eye was that, if the stem is removed from a grape, the hole looks like the pupil of the eye and the grape resembles the eyeball.
2. A nonspecific term for any intraocular inflammatory disorder or any part of the uveal tract.
The uveal tract structures (iris, ciliary body, and choroid) are usually involved, but other nonuveal parts of the eye, including the retina and cornea, may also be involved.
Uveitis that is not associated with known infections, or that is associated with diseases of unknown cause, is termed endogenous uveitis. This is thought to be due to an autoimmune phenomenon.
The patient may experience varying degrees of discomfor or pain, with or without blurring of vision.
In many cases a cause is never found; however, some known associations include various types of arthritis, some bowel diseases, virus illnesses, tuberculosis, syphilis, parasites, and fungi.