Biallelic variants in the ABCA4 gene are implicated in Stargardt disease type 1 (STGD1) [1], characterized by progressive macular degeneration, fundus flecks caused by amassed toxic metabolites formed during the visual cycle and a peripapillary region resistant to disease-associated changes [2]. The gene discussed is ABCA4; the disease is severe early-childhood-onset retinal dystrophy.