Just thought I'd share this tip.
You can use appendage groups to create eyelashes. It's a bit fiddly, and appendage groups weren't really made for this, but it's definitely possible to do.
The advantage of doing it through appendage groups is that you can sculpt eyelashes freely and form "clumps", which is perhaps more natural looking.
I'm not a very good artist, but here's a proof of concept:
Example character file:https://www.dropbox.com/s/e1607fd3fq09brg/eyelashtest.yl2c?dl=0