http://erepo.unud.ac.id/id/eprint/6688/1/619dd02f88e428d5252a2262201d87eb.pdf
https://staff.ui.ac.id/system/files/users/widya.artini/publication/5_jos_-_diktatglaukoma_primer_sudut_tertutup_akut.pdf
http://eprints.undip.ac.id/63545/3/BAB_2.pdf
https://www.college-optometrists.org/clinical-guidance/clinical-management-guidelines/primaryangleclosure_primaryangleclosureglaucoma_pa#:~:text=Primary%20Angle%20Closure%20Glaucoma%20(PACG,of%20those%20%E2%89%A570%20years.