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Uveitis (/ ˌ juː v i. aɪ t ɪ s /) is inflammation of the uvea, the pigmented layer of the eye between the inner retina and the outer fibrous layer composed of the sclera and cornea. [1] The uvea consists of the middle layer of pigmented vascular structures of the eye and includes the iris , ciliary body , and choroid .
Intermediate uveitis is a form of uveitis localized to the vitreous and peripheral retina. Primary sites of inflammation include the vitreous of which other such entities as pars planitis, posterior cyclitis, and hyalitis are encompassed.
Human eye.. The ocular immune system protects the eye from infection and regulates healing processes following injuries. The interior of the eye lacks lymph vessels but is highly vascularized, and many immune cells reside in the uvea, including mostly macrophages, dendritic cells, and mast cells. [1]
Photopsia; This is an approximation of the zig-zag visual of a scintillating scotoma as a migraine aura. It moves and vibrates, expanding and slowly fading away over the course of about 20 minutes.
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Posterior synechia can be observed in cases of anterior uveitis secondary to severe to moderate bacterial keratitis. [2] Posterior synechia also cause glaucoma, but with a different mechanism. In posterior synechia, the iris adheres to the lens, blocking the flow of aqueous humor from the posterior chamber to the anterior chamber.
Overall, more than 30,000 employers across the US had at least one H-1B visa petition approved in 2024, and over half of those new petitions went to employers that filed 20 or fewer applications.
The ten photos below are the result of many conversations in which we weighed the images from this year that made us feel the most—and question the most. These are the images we always came back to.