Quartz
Hero
as a semi-good DM, i responded with "i dont know."...which i dont.
They have eyes if you want them to have eyes.
as a semi-good DM, i responded with "i dont know."...which i dont.
Gee, our eyes seek hay?A grick has one I right in the middle.
I would be inclined to say that a grick's entire skin surface is photosensitive, and its brain assembles an image out of the light hitting its skin.
My rule with aberrations is that any time there is a question about their physiology or biology, the answer is weird and unnatural. (5E changed gricks to "monstrosities" for no reason I can see, but as far as I'm concerned they're always going to be aberrations.)