professionals.  [Online].  Retrieved August 2001, from the World Wide Web: 

http://www.afb.org/info_document_view.asp?documentid=1367. 

American Optometric Association (1997).  Who wears contact lenses:  Some facts  

and statistics. [Online].  Retrieved September 2001, from the World Wide Web: 

http://www.aoanet.org.  

American Printing House for the Blind. (1999). Annual report October 1, 1998  

September 30, 1999. Louisville, KY: American Printing House for the Blind.  

Data Source: Lists students registered by four major types of programs (by grade 

and reading media). 

Blackorby, J., & Wagner, M. (1996).  Longitudinal postschool outcomes of youth  

with disabilities: Findings from the National Longitudinal Transition Study.  

Exceptional Children, 62, 399 413. 

Data Source: The National Longitudinal Transition Study of Special Education 

Students (NLTS) conducted during the 1985 1986 school year. Data on 

employment was collected from parent/guardian surveys conducted in 1987. 

Cataract Management Guideline Panel (Feb. 1993).  Cataracts in adults: 

Management of functional impairment. Clinical Practice Guideline, Number 4, 

Rockville, MD.  U.S. Dept. of Health and Human Service, Agency for Health Care 

Policy and Research.  AHCPR Pub. No.  93 0542.  

Sources of Data: 

1.   Framingham Eye Study (1973 1975). Definition: lens opacities accompanied 

by visual acuity of 20/30 or worse.     

The following source is cited:  

Kahn, H.A., Leibowitz, H.M., Ganley, J.P., Kini, M.M., Colton, T., Nickerson, 

R.S., & Dawber, T.R. The Framingham Eye Study.  I. Outline and major 

prevalence findings.  American Journal of Epidemiology, 106, 17 32. 

2.  National Health and Nutrition Examination Survey (NHANES). Definition:  

 opacities accompanied by visual acuity of 20/25 or worse.   

 The following source is cited:  

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