Similar as Amos - also at age 40 diagnosed as having minor micro-motor control disabilities, but an IQ od SD +5 (3 in 100,000) - funnily enough I can't pass the Mensa exam itself to get in, but got in thru the IQ test! And that's not uncommon too, so Mensans say ... :-)

When looking at computer or TV screens, if I talk, or hear music, depending on the scan frequency of the display device, I often get 'jitter' of the viewed screen.