part of part of superficial_to camera-type eye organ subunit ectoderm-derived structure ocular surface region EMAPA:35336 MA:0002486 The integrated unit (of the eye) that consists of the conjunctiva, the corneal surface, and the ocular mucosal adnexa including the lid margins and the meibomian gland openings, the lacrimal glands and the lacrimal drainage system, all which are critical to maintain ocular surface integrity and provide protection from external antigens and pathogenic microorganisms. UBERON:0010409 eye surface eye surface region ocular surface uberon surface of eyeball