RHO and retinitis pigmentosa: The phenotypes tested include Prph2+/Δ307, Prph2rd2/rd2, Rho–/–, PDE6βrd1/rd1, Crb1rd8/rd8, and Gnat1–/–, the first four being models of retinitis pigmentosa, the following, a model of LCA, and the latter a model of stationary night blindness.