part_of part of part of has_part has part has part continuous with continuous_with continuous with develops_from develops from develops from developmentally induced by developmentally induced by developmentally_induced_by contributes to morphology of connected anatomical structure cornea tunica cornea the transparent anterior portion of the fibrous coat of the eye that serves as the chief refractory structure corneas cornea of camera-type eye corneal epithelium sclera anterior segment of eyeball surface structure optic eminence anterior limiting lamina of cornea lens vesicle corneal primordium multicellular anatomical structure neural crest-derived structure ocular surface region tunica fibrosa of eyeball