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Chemosis is the swelling (or edema) of the conjunctiva. The term derives from the Greek words cheme and -osis, cheme meaning cockleshell due to the swollen conjunctiva resembling it, and -osis meaning condition. [1] The swelling is due to the oozing of exudate from abnormally permeable capillaries. In general, chemosis is a nonspecific sign of ...
Iridocyclitis is inflammation of the iris and ciliary body with inflammation predominantly confined to the ciliary body. Between 66% and 90% of uveitis cases are anterior in location (iritis). [ 4 ] This condition can occur as a single episode and subside with proper treatment or may take on a recurrent or chronic nature.
Swelling of the sclera may also occur. [1] Itching is more common in cases due to allergies. [3] Conjunctivitis can affect one or both eyes. [1] The most common infectious causes in adults are viral, whereas in children bacterial causes predominate. [7] [3] The viral infection may occur along with other symptoms of a common cold. [1]
Macular edema occurs when fluid and protein deposits collect on or under the macula of the eye (a yellow central area of the retina) and causes it to thicken and swell . The swelling may distort a person's central vision , because the macula holds tightly packed cones that provide sharp, clear, central vision to enable a person to see detail ...
What they look like: Chiggers, a type of small mite, typically leave clusters of bites that are often very itchy. In many cases, chigger bites appear as small, red and itchy bumps. Sometimes, they ...
The most important role of melanin in the iris is to protect the eyes from the sun's harmful rays. [76] People with lighter eye colors, such as blue or green, have lessened protection from the sun, and so need greater protection from the sun's rays than those with darker eye colors. [citation needed]
Lisch nodules on surface of iris Lisch nodule , also known as iris hamartoma , is a pigmented hamartomatous nodular aggregate of dendritic melanocytes affecting the iris , [ 1 ] named after Austrian ophthalmologist Karl Lisch (1907–1999), who first recognized them in 1937.
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