EYS and retinitis pigmentosa 25: The autosomal recessive retinitis pigmentosa 25 (RP25, OMIM #612424) is caused by abnormal EYS (Abd El-Aziz et al., 2008; Collin et al., 2008), a secreted extracellular matrix protein, in several populations worldwide (Abd El-Aziz et al., 2008, 2010; Audo et al., 2010; Bandah-Rozenfeld et al., 2010; Barragán et al., 2010; Chen et al., 2015; Collin et al., 2008; Di et al., 2016; Hosono et al., 2012; Littink et al., 2010b).