That's fine, the biggest problem though is that it is just plain hard to understand the forms involved in the image.
The eye-ball itself is a spherical shape, and so shadeing it like one would help distinguish it's form as spherical.
The eye-lids lay over the eye-ball, and therefor inherit the underlying form.
You've got a tear which has a light coming from the left it seems, and the actual eye is lit from the lower-right. I'd try to unify the lightsource and investigate how the light forms the shadows on everything.
the eye is looking to the left I think, which may be why its hard to see the iris because it blends into the background. Some people may not understand it as so, and so it may be better to try it a different way so that it comes off as an eye to someone.