Board Thread:Suggestions forum/@comment-33328512-20171014181948/@comment-26322120-20171128031230

I'm just going to move this to general mod discussion.

Assuming you accept evolution as an active phenomena in Middle Earth (which I accept some people dispute), eyes would begin to become vestigial in cave trolls over the course of millennia, as having eyes would give the majority of cave trolls no advantage. Of course as a side effect, cave trolls' other senses (mainly hearing) would become extra receptive.