A study of different eye shapes, types and their perceived emotion. Quite often puppet eyes are fixed and static (although not always). This post takes a look at different eye and eyebrow shapes and how these can convey different emotions. I've also included links via buttons to the websites I referenced.
Unfortunately I've lost the link for these cats eyes (above). If anyone recognises them let me know and I'll add a credit.
This website (see button below) has more information on different aged humans, males/females and face shapes.