Figure 3. Comparison of electroretinography findings of family members. Note the undetectable full-field electroretinography of all responses in the proband (II:4). The dark adapted responses were unrecordable in II:3 and markedly impaired in III:1 and III:2, while the light adapted responses were less compromised. Electrofunctional responses in female carriers (II:2 and I:2) were slightly impaired. RE, right eye; LE, left eye.