MERTK and retinitis pigmentosa 1: Variants in MERTK were found in six individuals of which six had a potential molecular genetic diagnosis caused by variants in MERTK. These individuals were part of a cohort of 677, of which 421 had a clinical diagnosis of RP, corresponding to 1.7% of individuals with RP being caused by variants in MERTK, which is comparable to the findings of Audo et al. [5].