I just posted a sheet of Tips on drawing Eyes for $5+ pledgers on Patreon. It was requested by Chey Perk.   Chey asked for tips on how i draw sans' eyes, but i ended up covering the basics for character design. So the rules here apply to all characters. CLICK HERE 

to go to my Patreon~ As a $5 pledger you can also suggest ideas for future tutorials and gain access to past tutorials.