Review

.:Ideas/Suggestions:.
1:The overall eye seems to be hard too see a bit, i suggest bringing it to life by sharpening and maybe adding more veins.
2:I would make the eye brow above the eye a little more see-able, at the moment its hard too see it.
3:Add some more shading towards the eye too make it seem 3-Dish.
4:All the colors you have are quite pale i suggest brightening them up a bit.
(All my recommendations to your icon, you can choose to use these or not, your choice.)