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The uvea is the middle layer of the eye, situated between the outer layer (sclera and cornea) and the inner layer (retina). It is crucial for several functions, including providing nourishment to the eye and playing a key role in regulating light entry.
The uvea consists of three main parts:
Iris: The colored part of the eye that controls the size of the pupil, thus regulating the amount of light that enters the eye.
Ciliary Body: This structure is located behind the iris and is responsible for producing aqueous humor (the fluid in the front part of the eye) and controlling the shape of the lens for focusing.
Choroid: A vascular layer that provides blood supply to the retina and contains pigment cells that help absorb excess light.
Conditions affecting the uvea can lead to uveitis, which is inflammation of this layer and can cause pain, redness, and vision changes. Proper functioning of the uvea is essential for maintaining overall eye health and optimal vision.
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