In another study, Böhm et al. used dual split-intein-based AAV vectors to activate the rhodopsin-related Opn1mw (middle wavelength opsin, M-opsin) gene in rod photoreceptors in the rhodopsin-deficient mouse model for retinitis pigmentosa, the most common form of inherited retinal blindness. The gene discussed is RHO; the disease is retinitis pigmentosa.