I thought some might find this of interest. It may also shed some light on why certain accessibility design consideration are important.
Results of a March 2013 survey of computer users with low vision conducted by WebAIM:
http://webaim.org/projects/lowvisionsurvey/
Philip M Kragnes, M.S.
Computer Accommodations Program
University of Minnesota
McNamara Alumni Center
200 Oak Street SE, Suite 180
Minneapolis, MN 55455-2002
Phone: 612-626-0365
Fax: 612-626-9654
E-mail: [log in to unmask]
Twitter: @PKragnes
Facebook: phil.kragnes