[Manifestations of possible trophic changes in the corneal epithelium due to decreased trigeminal function]

Neurotrophic corneal changes are described on the basis of six cases: 1) diabetes mellitus; 2) after surgery for trigeminal neuralgia; 3) intracerebellar hemorrhage; 4) postinfectious trigeminal neuropathy; 5) Wallenberg's syndrome; 6) encircling procedure for retinal detachment. The symptoms in common suggest a decrease in the trophic influence of the trigeminal nerve.