COL2A1 and respiratory distress syndrome in premature infants: Comparable to the infantile group, vitreoretinal syndromic IRDs accounted for the second largest group (23.5%), with 11.6% carrying Stickler genotypes (COL2A1 (9.7%), COL18A (1.9%)), followed by 9.8% KIF11-associated IRD, and 7.8% were identified as mitochondriopathies (KSS (3.9%), MT-TL1 (1.9%), Pearson syndrome (1.9%)).