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Tyndall phenomenon observed in the fluid of the anterior chamber of the eye.
During slit lamp examination of the eye, an abnormal appearance of the beam of light as it travels through the anterior chamber. The flare is caused by light reflecting off proteins in the aqueous humor. It is found in patients with inflammation in the anterior chamber.
Scattering of light seen when a slit-lamp beam is directed, obliquely to the plane of the iris, into the anterior chamber. It occurs as a result of increased protein content, and usually inflammatory cells, in the aqueous humour. Visual impairment depends on the intensity of the flare. It is a sign of intraocular inflammation. See Tyndall effect; iritis; uveitis.