Electroretinographic findings in selected pedigrees with choroideremia

We recorded full-field electroretinograms from 47 males and 26 obligate carrier females with choroideremia. All males had responses that were subnormal with delayed cone b-wave implicit times or undetectable. Only four of 26 females had abnormal electroretinographic responses but 25 of 26 were identified by ophthalmoscopy.