Although the COL8A2 gene (OMIM: #120252) is associated with the phenotypes of FECD type 1 (MIN: #136800) and PPCD type 2 (MIM: #609140) with an autosomal dominant inheritance pattern, COL8A2 is associated with corneal thinning and keratoconus. The gene discussed is COL8A2; the disease is keratoconus.