In the process of knitting an Amigurumi toy Bunny in a pink dress, I decided that the muzzle and eyes of her will be embroidered. So the knitted bunny will look more interesting, rather than with buttons or ready plastic eyes. Below you can see video MK with a photo of how to embroider a rabbit’s eyes.
Pattern of the Amigurumi rabbit on the link.
Video master class
The video shows the whole process of eye embroidery.