1. Number of people with glaucoma worldwide;Quigley;Br J Ophthalmol,1996
2. Primary open angle glaucoma, preferred practice patterns,1992
3. Racial variations in the prevalence of primary open-angle glaucoma;Tielsch;JAMA,1991
4. The value of screening for glaucoma with tonometry;Eddy;Surv Ophthalmol,1983
5. Screening for glaucoma;Tielsch,1993