The study population shall consist of up to 250 Stargardt disease patients (minimum of 150 patients) recruited at up to 14 clinical centers across the US and Europe. Must be at least 6 years old, able to cooperate in performing the examinations and be willing to attend regular 6 month follow-up visits for up to 24 months. Must present with atrophic lesions secondary to STGD and previously genotyped (at least 2 confirmed pathogenic mutations in the ABCA4 gene). If only 1 ABCA4 allele contains a pathogenic mutation, then the patient needs typical phenotype, i.e. at least one eye must have flecks at the level of the retinal pigment epithelium typical for STGD. Best-corrected visual acuity (BCVA) must be 20 ETDRS letters (20/400 Snellen equivalent) or better.