Among the five known glaucoma-causing genes– MYOC (myocilin), CYP1B1 (cytochrome P450, family 1, subfamily B, polypeptide 1), OPTN (optineurin), WDR36 (WDR36), and LTBP2 (latent transforming growth factor beta binding protein 2)–all except WDR36 were identified in three of the studies (Table 6B) [22,23]. Here, OPTN is linked to glaucoma.