Mutations in USH1C were previously reported to cause the following phenotypes: Usher syndrome type 1 (characterized by congenital profound SNHL, vestibular dysfunction, and RP) [19], [20], nonsyndromic profound SNHL at the DFNB18 locus [9], [21], and sector RP with early-onset SNHL [22]. This evidence concerns the gene USH1C and Usher syndrome type 1.