Since I'm not very good with eyes I decided to punch out a few trial eyes.

Anything with a check mark I like, Q-marks are iffy, and the one and only X is a style I don't like at all.
I tried to build off my one line eye style that seems to fit well with my overall style and it seems to have come out okay. If anyone has any opinions please drop them off below.

Drawn on my iPad using my finger and Sketchbook Pro.