COL2A1 and vitreoretinal degeneration: Bilateral RRD was only seen in collagenopathies/vitreoretinopathies with COL2A1 (n = 2, 33.3%), COL11A1 (n = 1, 16.7%), COL18A1 (n = 1, 16.7%) and FBN1 (n = 2, 33.3%) genotypes.