He could, of course, improve his sight with glasses or contact lenses, but chooses not to.

BBC: Korea's blind' archer Im Dong-Hyun aims for 2012 gold

The glasses, which thrust wearers into darkness, have been required for sight-challenged athletes running in triathlons overseen by the defendants since 2010, according to Bernstein.

CNN: SHARE THIS

Five days of trading the field glasses and taking turns crawling back into the trees to smoke out of sight.

NEWYORKER: The Tree Line, Kansas, 1934

Scheidies says he doesn't buy the argument that the blackout glasses ''level the playing field'' between runners who have some sight and those who have none.

CNN: SHARE THIS