Electrophysiological Studies in Groenblad-strandberg Syndrome

Fifteen cases (30 eyes) of Groenblad-Strandberg pseudoxanthoma elasticum were examined on the electrophysiological point of view. In only more or less 50% of the cases the results were subnormal. The diamox-test, which may be a functional test of the pigment epithelium, was also abnormal in 50% of the cases. Its significance is still not clear.