A good way to do the eyes is to apply a cote of white enamel, and then paint the face with flat flash acrilycs. After the paint is dried, I use a fine brush moistened in alcohol and brush carfully over the eyes. It will remove the flesh acrilycs but the white enamel will stay. Then you just have to paint the iris.
The good thing is, you won't get a " too white dool's eyes"