Blind Mathematicians
onionesquereality.wordpress.com
onionesquereality.wordpress.com
On a different but related note: Some people in the deaf community has long argued that deafness is not an handicap and in fact can be considered as "a difference in perception", akin to having a different native language or coming from a different country. Although the more radical aspects of such a position is untenable (some deaf parents declare they would rather have deaf child rather than a gearing one) the fact that having constraints put on perception will lead to increases in other aspects of it is quite interesting, I think. Should we call it "the conservation of perception"?
Edgar R. Lorch, Szeged in 1934, American Mathematical Monthly, vol. 100, #3, pp.220–221