part_of part of part of has part has part has_part Danio rerio cornea sclera organ component layer eyeball of camera-type eye structure with developmental contribution from neural crest tunica fibrosa of eyeball FMA:58102 SCTID:361318005 uberon corneosclera The sclera and cornea form the fibrous tunic of the bulb of the eye; the sclera is opaque, and constitutes the posterior five-sixths of the tunic; the cornea is transparent, and forms the anterior sixth. fibrous tunic UBERON:0012430 fibrous layer of eyeball tunica fibrosa Wikipedia:Fibrous_tunic_of_eyeball