what is choroiditis
1 Choroiditis: Inflammation of the part of the eye called the choroid (layer behind the retina). 2  Usually only one eye is affected.3  Choroiditis: Inflammation of the choroid in which the sensory retina becomes edematous and opaque.horoiditis is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Choroiditis, or a subtype of Choroiditis, affects less than 200,000 people in the US population.