Uveitis is inflammation of the uvea, the middle layer between retina and sclera. The uvea contains many of the blood vessels, the veins and arteries, that carry blood flow to the eye. Inflammation of the uvea can affect the cornea, the retina, the sclera, and other vital parts of the eye, thus causing damage for your sight.

Causes
Uveitis has various different causes such as a virus, a fungus, or a parasite. In most cases, the cause remains unknown. Inflammation in one eye can lead to a severe injury to the other eye.
Symptoms
Uveitis may occur suddenly with redness and pain, or slowly with little pain or redness, but gradually with blurring of vision.

There are 3 types of uveitis

1. Iritis or anterior uveitis
When the uvea is inflamed near the front of the eye in the iris-the anterior part of uvea, it is red and painful.

2. Intermediate uveitis
It affects the muscle that focuses the lens. It is the inflammation of ciliary body,the middle part of uvea.

3. Choroiditis
An inflammation is located in the posterior part of uvea and may affect the retinal vessels. It may be called posterior uveitis or chorioretinitis.

Treatment
Eye drops such as steroids and pupil dilators are used to reduce inflammation and pain. Moreover, oral medication or/and injections is used to treat deeper inflammation. These drugs prevent adhesion or scar formation or attachment of iris to lens that causes to secondary glaucoma and blindness.


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