What are the little red lines in people's eyes? They look sorta like cracks. What causes them?

 

These are the blood vessels in the eye. If you eye becomes irritated they show up.

 

got me.
got pix?

 

That's been my experience at least.

 

Dry eyes...Get Clear Eyes (Ben Stein, Clear Eyes commercial)

Redness equals:
Dryness
Irritation
Smoking Illegal Contraban (sp?)
Very Tired (at least for me)
Waking up too early (again maybe its just me, happens to me if I wake up at 5am or earlier)

 

^^ don't forget "crying like hell"

 

Dude it's called suspicion of drug use