"What good is this man now?
He's got no depth perception!
All he can do is walk, point, and take the first hit!"

Monologue from the movie 'Soldier' after a genetically engineered warrior lost one eye in a training combat with soldier Todd (Kurt Russel). The first time I saw the issue discussed in a movie. (DVD chapter 5,  time index 15 minutes)
 

This 1974 thriller starring Warren Beatty is totally off-topic of course!?! But isn't the title neat? :-)

Both titles available at www.dvdexpress.com where I've 'stolen' the covers.