Central cataract (Fahr’s central cataract) is a complication of diabetes mellitus, expressed in clouding of the lens capsule and the formation of a specific central fluorescent structure of the iris. The phenomenon was described in 1874 by the German ophthalmologist Hermann Barthel von Fahraeus. The disease is named after the Barbary pathologist and ophthalmologist Tomias Farndonpus, who studied the disease and proposed its clinical