I was just watching "Who Wants to be a Millionaire" on the tube. A question came up, "Which President used a contact lens to read a speech with one eye and the other eye without to read the audience?"
The answer was Ronald Reagan. From the link above
Amar Klar, a scientist who has worked on handedness, says that left-handed people "have a wider scope of thinking", and points to the disproportionately high number of Nobel Prize winners, writers, and painters who are left-handed. Michael Peters, a neuropsychologist at the University of Guelph, points out that left-handed people have to get by in a world adapted to right-handers, something which can give them extra mental resilience.
Interesting that so many of the recent presidents were left handed or ambidextrous.