ABCA4 and age-related macular degeneration: ,29,30 Studies that included patients with retinal pathology presented an intra-visit repeatability of ±10.3% in patients STGD1,17 ±8.8% in patients with bull's eye maculopathy (in some patients caused by mutations in ABCA4),31 ±9.3% in patients with a retinal dystrophy caused by ABCA4 or PRPH2 mutations,32 ±7% in patients with Best vitelliform macular dystrophy,33 and ±8.2% in patients with age-related macular degeneration (AMD).34