A person with a disability that has any of the long-lasting conditions such as blindness, deafness, or a severe vision or hearing impairment (Erickson & Lee, 2008).
Erickson, W., & Lee, C. (2008). 2007 disability status report: United States. Ithaca, NY: Cornell University Rehabilitation Research and Training Center on Disability Demographics and Statistics. http://digitalcommons.ilr.cornell.edu/cgi/viewcontent.cgi?article=1256&context=edicollect