kin tones require a fine touch with shading. I use an eraser to lift excess tone, sometimes re-drawing several times until I get the subtle shading that I want. I've made the shading in the whites of the eye a little darker so that the highlights look brighter.
Notice that I haven't drawn the eyelashes yet. I want to be able to smudge and erase the tones on the eyelids without disturbing the eyelashes.