Talk:Kakugan/@comment-2601:580:4200:E545:1887:1AE6:E59F:E841-20180320013922/@comment-27283194-20180407215223

I'm starting to think that maybe they literally serve no purpose other than to show RC cells being "used" in the body at a high rate, since they activate when someone uses their kagune, automatically. Kaneki didn't show any noticeable changes in his eyesight when he initially had his kakugan active, nor sometimes knew when it changed, I believe.

I'd assume that when it DOES change, however, that it would get more physical protection like you also say, Haro, since it's more RC cells flowing through the eyes.