Retinitis. Inflammation of the retina is met with in the subjects of Bright's disease (albuminuric retinitis), in diabetes, and in syphilis. Pigmentary retinitis is a remarkable disease affecting the retina and choroid, which, when it appears, usually manifests itself in several members of the same family. All these conditions are detected by the use of the ophthalmoscope. In detachment of the retina that membrane becomes separated from the choroid coat by the effusion of fluid between the two; it is met with in conditions of extreme myopia.