1. Agency for Health Care Policy and Research: Cataract in Adults: Management of Functional Impairment. Clinical Practice Guideline No 4. Rockville, AHCPR Publication No 93-0542, February 1993.
2. White paper on cataract surgery;American Academy of Ophthalmology and American Society of Cataract and Refractive Surgery;Ophthalmology,1996
3. American Academy of Ophthalmology: Cataract in the otherwise healthy adult eye. Preferred Practice Pattern. Available at http://www.aao.org/. Accessed January 2003
4. Policy Reference Guide of the American Academy of Pediatrics;American Academy of Pediatrics,1997
5. Quality of care;American Medical Association, Council of Medical Service;JAMA,1986