So far, three genes have been identified for POAG from the reported genetic loci: myocilin (MYOC, OMIM 601652) [10,11], optineurin (OPTN, OMIM 602432) [12], and WD repeat-domain 36 (WDR36, OMIM 609669) [13]. The gene discussed is MYOC; the disease is open-angle glaucoma.