User blog comment:PcRetro/Shunsui with no eye patch?/@comment-5695542-20131128230759

In the one panel where we see the right side of his face clearly, his eye and ear was too detailed for this to be a flaw. I guess Kubo will reveal the truth in one of the next chapters.

Although it could be like Omaeda's shikai Gegetsuburi in both manga and anime depictions between its first and second appearance and 3rd looks (1st and 3rd are the same (big spikes with only a few spikes) 2nd seen spikes were small and many in number).