ABILITY is the Word

Bill Gates, Renowned for his company Microsoft, Gates is legally blind.

In North America and most of Europe, legal blindness is defined as visual acuity (vision) of 20/200 (6/60) or less in the better eye with best correction possible. This means that a legally blind individual would have to stand 20 feet (6 m) from an object to see it with the same degree of clarity as a normally sighted person could from 200 feet (60 m).

Montel Williams, famous American talk show host on television, recently announced he has a type of Multiple Sclerosis. He continues his weekly talk show.

Tom Cruise, Hollywood movie star, he has dyslexia. He has yet to be able to read a film script, yet performs beautifully in many various roles.
Dyslexia is most commonly characterized by difficulties with decoding written text or with achieving accuracy and fluency in reading, and by poor spelling. Dyslexic individuals may also reverse or transpose letters when writing or confuse letters such as b, d, p, q, especially in childhood. However, dyslexia is not a visual problem that involves reading letters or words backwards or upside down, nor are such reversals a defining characteristic of dyslexia.

Many individuals with dyslexic symptoms involving reading, writing, and spelling, also have common shared symptoms such as poor short-term memory skills, poor personal organizational skills, problems processing spoken language, left-right confusion, difficulties with numeracy or arithmetic, and issues with balance and co-ordination.

Source:http://www.wapd.org/news/021103.html
& wikipedia