Important References

These are good references. i will place them in the bibliography.

The first is a careful demographic study of low vision between 20/60 and
20/200. The US estimate is 11,000,000 correctable and uncorrectable.
3,000,000 are uncorrectable. Note the huge number of correctable even in
the US.

The second looks at letter spacing with very small increments. Increments
of 1/10 of the space between letters. Better funded studies use larger
spacing and to not achieve results. Eva McLeish is a special ed elementary
teacher, but she sure knows her statistics.

Vitale S.,  Cotch M. F., Sperduto R. D. (2010). Prevalence of Visual
Impairment in the United States. Journal of the American Medical
Association, Vol 295, No. 18, Retrieved from
http://jama.jamanetwork.com/article.aspx?articleid=202836

McLeish Eve, A Study of the Effect of Letter (2007). Spacing on the Reading
Speed of Young Readers with Low Vision, British Journal of Visual
Impairment. 25:133, Retrieved from http://jvi.sagepub.com/content/25/2/133,
DOI: 10.1177/0264619607075995


Wayne