ABCA4 and retinitis pigmentosa 1: It was first observed in patients with NR2E3-dominant RP in 2012 [21,22] followed by associations with different genetic types of RP as well as other dystrophies (e.g., ABCA4-retinopathy) [23,24]; although on review the reported phenotypes may not fit exactly the same pattern in terms of the ring size, shape, and location.