1. World Health Organization. Magnitude and causes of visual impairment. Available at http://www.who.int/mediacentre/factsheets/fs282/en/index.html. Accessed May, 2009.
2. Demographic characteristics of the vision-disabled elderly;Elliott;Invest Ophthalmol Vis Sci.,1997
3. The effect of relative size magnification vs relative distance magnification on the reading performance of children with low vision;Bevan,2000
4. Reading performance in children with low vision;Lovie-Kitchin;Clin Exp Optom.,2001
5. Outcomes of the Veterans Affairs Low Vision Intervention Trial (LOVIT);Stelmack;Arch Ophthalmol.,2008