1, morphological examination: general examination: fundoscopy; slit lamp anterior microscopy, trifocal microscopy special examination: fluorescein fundus angiography, ICG choroidal angiography, fundus color photography, autofluorescence, OCT examination 2, functional examination: electrophysiological examination (EOG, ERG, VEP, multifocal ERG) psychophysical examination (visual acuity, visual field, contrast sensitivity, color vision)