He might say that, too. Although, to be fair, it only makes the world lose depth perception.
Not necessarily. If I take your eye, and you take mine, then we both have one eye left - but were bound to offend someone else (take their eye), therefor, we would lose our other eye, labeling us as 'blind'. I know what you're thinking - "Who cares?". I couldn't agree more.
On topic: Regardless of what Benny says, I most likely won't be able to bring myself to kill him. I could never kill anyone voiced by Mathew Perry.