Jack: How the hell can I get eyes like that?
Riddick: First, you've got to kill a few people.
Jack: Ok. I can do it!
Riddick: And then you get sent to a slam where they tell you you'll never see daylight again. So you dig up a doctor, pay him twenty menthol Kools to do a surgical shine job on your eyes…
Jack: ...so you can see who's sneaking up on you in the dark!
Riddick: Exactly!
Powerful urge to watch the films again...
On a related note:
A mother presents at triage with her toddler son. It seems that after watching some cartoon he wanted to see in the dark so he took one of his raver sister's glow sticks, cracked it open and poured the gel on his eyes.
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