Specifically, HM was identified in six children with retinal dystrophies (RPGR; N = 2, CACNA1F; N = 2, RP2, NDP) and one child each of corneal dystrophy (ZEB1) and Stickler syndrome (causative variant in the COL9A2 gene). The gene discussed is COL9A2; the disease is inherited retinal dystrophy.