1. Vision problems in the US: Prevalence of adult vision impairment and age-related eye disease in America. 2008 update to the 4th ed,2008
2. Prevalence of disabilities and associated health conditions among adults–United States, 1999;MMWR Morb Mortal Wkly Rep,2001
3. The economic impact of vision problems: the toll of major adult eye disorders, visual impairment and blindness on the US economy,2007
4. Diabetic Retinopathy: What You Should Know. Washington, DC: National Eye Institute, National Institute of Health; rev September 2003. NIH Publication no. 06-2171. Available at: http://www.nei.nih.gov/health/diabetic/diabeticretino.pdf. Accessed June 9, 2013.
5. Vision loss: a public health problem?;Saaddine;Ophthalmology,2003