USH2A and inherited retinal dystrophy: Pathogenic NCSSs have been described in many genes associated with inherited retinal dystrophies, including ABCA4, BEST1, POC1B, CACNA2D4, FSCN2, MAK, MERTK, PRCD, RIMS1, RP2, RPGR, or USH2A [44,46,47,48,49,50].