CRB1 and Stargardt disease: Several cases of UPiD‐associated IRD have been described, including Stargardt disease with ABCA4 gene (Riveiro‐Alvarez et al. 2007), cone dystrophy with TULP1 gene (Roosing et al. 2013), retinitis pigmentosa with USA2A (Rivolta, Berson, and Dryja 2002) or MERTK (Thompson et al. 2002) genes, and LCA with CRB1 gene (Stone 2007).