1. Quigley HA, Broman AT. The number of persons with glaucoma worldwide in 2010 and 2020. Br J Ophthalmol. 2006;90(3):262–7.
2. Foster PJ, Buhrmann RR, Quigley HA, Johnson GJ. The definition and classification of glaucoma in prevalence surveys. Br J Ophthalmol. 2002;86:238–42.
3. Aung T, Friedman DS, Chew PTK, Ang LP, Gazzard G, Lai YF, et al. Long-term Outcomes in Asians after Acute Primary Angle Closure. Ophthalmology. 2004;113(7):1087–91.
4. Hodapp E, Parrish RK, Anderson DR. Clinical decisions in glaucoma. 1st ed. Mosby-Year Book: St. Louis; 1993.
5. World Health Organization International Statistical Classification of Diseases and Related Health Problems. Version: 2010. Chapter VII H54.9. http://apps.who.int/classifications/icd10/browse/2010/en .