*2.1. RHO*

Mutations in *RHO* can result in a range of phenotypes, most commonly autosomal dominant RP (adRP), but also autosomal recessive RP (arRP) and congenital stationary night blindness (CSNB). Animal models and in vitro studies have allowed *RHO* mutations to be divided into seven classes (see [17] for a recent review).
