You won't be learning much from my SVGs because I developped the habit to convert every path effects as a shape right away(Ctrl+Shift+C) because of a bug at that time that was resetting all of my curves.
For example, for the eyelashes I would proceed this way:
1)Create a bunch of different sized triangles,
2)create a curve for each eyelash,
3)Add different triangles as a pattern along certain paths,
4)Ctrl+Shift+C + Merge everything(Ctrl++).
Now. You won't have to do Step 4 since the bug isn't there anymore, so you'll be able to iterate everything, always, and forever! :)