To date, about 23 loci have been linked to different types of glaucoma, and four genes, myocilin (MYOC), optineurin (OPTN), cytochrome P450 1B1 (CYP1B1), and WD repeat domain 36 (WDR36), have been identified as glaucoma causing genes [3-6]. Here, CYP1B1 is linked to glaucoma.