Ahh, there we go. Ocular Adept, Faiths and Pantheons, page 200. Apparently, it's just the singular central eye of an Eyeball Beholderkin(like a lesser Beholder), and yet somehow it gains the ability to fire all 10 rays of a regular Beholder.
Likewise, one of the Fiendish Leg Grafts has the line about uneven legs reducing your speed. So just grab the Fast Leg to neutralise this, or else graft 2 Fast Legs.
Edit: Also, may want to edit your first post to add the part about Draconic Grafts being under "New Grafts" along with Construct/Deathless/Elemental/Plant.