Silver Book Fact
Glaucoma affects less than 1 in 100 people ages 40 to 49. That rate increases to close to 1 in 10 for individuals over the age of 80.
Friedman D, Wolfs R, O'Colmain B, Klein B, et al. Prevalence of Open-Angle Glaucoma Among Adults in the United States. Archives of Ophthalmology. 2004; 122(4): 532-8. http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed&uid=15078671&cmd=showdetailview&indexed=google