I dont think its particularly hard. If you look at the first pic, his brows are raised almost like he is surprised. He has very big eyelids that is being pulled down at the second half of the lids. He has a sleepy look. I would begin by raising the brows and then the lids. He has a consideral amount of skin between his lid and brow. He also has fat pads under his lowereye. And the iris is more to the upperlid than to the lower.