definition of retinitis
Freebase (0.00 / 0 votes) Rate this definition: Retinitis. Retinitis is inflammation of the retina in the eye, which may lead to blindness. Retinitis may be caused a number of different infectious agents. U.S. National Library of Medicine (0.00 / 0 votes) Rate this definition: Retinitis. Inflammation of the RETINA. It is rarely limited to the retina, but is commonly associated with diseases of the choroid (CHORIORETINITIS) and of the OPTIC DISK (neuroretinitis).