1. Preferred practice pattern: primary open-angle glaucoma. San Francisco: American Academy of Ophthalmology: 2005. Available at http://www.aao.org/education/library/ppp/upload/Primary-Open-Angle-Glaucoma.pdf(accessed June 2006).
2. American Academy of Ophthalmology. Preferred practice pattern: primary angle-closure glaucoma. San Francisco: American Academy of Ophthalmology; 2005.Available at http://www.aao.org/education/library/ppp/upload/Primary-Angle-Closure-2.pdf(accessed June 2006)
3. Issues in the epidemiology and population-based screening of primary angle-closure glaucoma;Congdon;Surv Ophthalmol,1992
4. Glaucoma screening. A cost-effectiveness analysis;Gottlieb;Surv Ophthalmol,1983
5. Periodic health examination, 1995 update: 3. Screening for visual problems among elderly patients. Canadian Task Force on the Periodic Health Examination;CMAJ,1995