The =choroid= is the vascular tunic of the eye. With the iris and
ciliary body it forms the =uvea=. The iris and ciliary body are rich
in nerve terminals and when inflamed; pain is a prominent symptom. The
choroid has no sensory nerve terminals. When it is involved alone; pain
is not present however severe the pathology. Embryologically Descemet’s
membrane is a part of the uvea. When the uveal tract is diseased we
frequently note symptoms of a descemetitis as a turbidity of the
anterior chamber and spots on Descemet’s membrane. When one part of the
uvea is inflamed the tendency is to pass to the other parts because of
the intimate blood supply.