Quote - Ifeyecover is truely invisible then make cornea invisible also for now until this is solved. It's not a proper node setup for cornea anyway. It has sclera and pupil on its colormap..

Save the map with two cornea spots to material library first (or copy/paste)so you can get it back..

If by invisible, you mean set the transparency to 1, it already is that way for the cornea (and also for the eye surface).