To date, at least 20 genetic loci for primary open angle glaucoma (POAG) have been reported [Table 3].[47, 48] Among them, 11 chromosomal loci had been designated GLC1A to GLC1K by the HUGO Genome Nomenclature Committee (www.gene.ucl.ac.uk/nomenclature). The gene discussed is MYOC; the disease is open-angle glaucoma.