Spontaneous regression of senile cataract, an extremely rare occurrence, is illustrated with reference to findings in a woman patient born in 1892. The lens capsule was intact; an irritation which had gone unnoticed by the patient had led to posterior synechia of the iris and to the formation of a precapsular membrane in the lower pupillary region. At the time of examination intraocular pressure was in the upper normal range (20 mmHg). Following treatment of the " "aphakia" with appropriate cataract lenses the patient attained a remarkable 0.6% vision and Jaeger 3.