CLRN1 and Usher syndrome type 3A: In humans, CLRN1 mutations have been found to cause Usher syndrome type 3A (USH3A), which is characterized by post‐lingual, progressive hearing loss, variable vestibular dysfunction and onset of retinitis pigmentosa leading to vision loss (Adato et al, 2002; Bonnet & El‐Amraoui, 2012).