Glad I wasn't the only one who got confused about the sunglasses ().
I thinkLixLornSmuchmuch has pointed out the biggest issue with them: the bridge of the sunglasses are very thin and meet almost exactly with his eyebrows. With all that black (hair, eyes, eyebrows, hand, arm, a lot of the mouth...) it was pretty much bound to get confusing... I think a different style of highlights might help too though, and I did realise they were sunglasses pretty quickly.
Edit: Woops Smuchmuch is using an avatar Lix used to use and I neglected to read the name. Sorry Smuchmuch!