We examined three patients with congenital grouped pigmentation of the
retina by means of electroretinography, electro-oculography and visua
lly evoked cortical potentials. Two patients were affected bilaterally
and 1 had a unilateral condition. Electrophysiological findings were
normal in all patients, and no inheritance patterns for the disease we
re found in any of the patients' histories. Only 5 cases of this disea
se have been reported in Asian countries in recent years. We believe t
hat our patients contribute to the sample of such cases regarding raci
al prevalence.