Inflammation of the vascular membrane of the eyeball. A gradual decline in vision occurs, and sometimes parts of the retina fail. Flashes of light occur in some cases. The phenomena arises because the inflamed vascular membrane swells, affecting the retina. Choroiditis usually affects both eyes. This rare condition is frequently caused by infection with toxoplasmosis, syphilis or a rheumatic disorder. It is not entirely clear how this inflammation arises. An allergic component probably plays a part, as in irisitis. On examination a number of round swellings can be seen on the retina, caused by the inflammation. These swellings become scars when the patient recovers. Choroiditis is treated with corticosteroids, or by treating the cause, if apparent. The eye must be rested. Treatment can be lengthy and the result is uncertain.

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