I did a quick sculpture study of an eye today.
About 20 minutes, from reference. I was also playing with a method for believable eyebrows. Kinda needs some work, but in 5 minutes and for a method I've never tried before, I'd say it isn't too terrible. Super simple too:
Standard brush for the big clumps, shrink the brush down and subtract from between the last lines you just put down, maybe add a bit on top to give them more of a peak, then Slash3 all over (in the direction of the hairs, of course) for the fine hairs. I think I just need to control the hair locations a bit more and I'll have a quick and solid method down.