Just how sensitive are the eyespots on Gorgon hair-tentacles, and what other sensory input do they get from said tentacles? is there a limit to how thick/thin they can be? when you say "brightly colored", can that mean a darker version of a color that we'd consider WACKY for skin tone? (like this or this?) Or is it always a brighter color?

I have all the nitty questions, sorry. ^_^