PTGDR and glaucoma: Further genes that have been linked to glaucoma include the cytochrome P450, family 1, subfamily B, polypeptide 1 gene (cyp1b1), which is notably associated with congenital glaucoma—a rare form of glaucoma that manifests at birth or within the first few years of life [9,60,61,62], and the cyclin-dependent kinase inhibitor 2B antisense RNA 1 gene (cdkn2b-as1) [63,64] among others.