Function of the Pigment Epithelium in Patients With Type 1 Neurofibromatosis

Electrophysiological recording of changes in electrical potential across the retinal pigmentary epithelium during successive periods of dark and light adaptation, according to ISCEV standards. Results will comprise dark trough value and light/dark (Arden) ratio.

Electrophysiological recording of retinal function. Results will comprise amplitudes and latencies of each electroretinography response (dark-adapted 0.01, dark-adapted 3.0, dark-adapted 10.0, dark-adapted 3.0 oscillatory potentials, light-adapted 3.0, light-adapted 3.0 flicker).