In this study, we built a pool of iPSC lines from 6 unrelated patients with BCD of 3 ethnicities with distinct CYP4V2 mutations (referred to as BCD-P1 to BCD-P6) and differentiated them into iRPE cells (Figure 1A). The gene discussed is CYP4V2; the disease is Bietti crystalline corneoretinal dystrophy.