User blog comment:ChishioKunrin/What is this in Oobleck's glasses?/@comment-10380701-20141013092106/@comment-4010415-20141013103226

Like in the far left screenshot, sometimes the inner side of Oobleck's lenses are completely gray for some reason, and they were like that in chapters 9 and 10.

So, I dunno. His glasses do weird things.