part of part_of part of part_of bounding layer of bounding layer of develops_from develops from acellular anatomical structure lens of camera-type eye capsule of lens (...) we reach the inescapable conclusion that the last common ancestor of jawless and jawed vertebrates already possessed an eye that was comparable to that of extant lampreys and gnathostomes. Accordingly, a vertebrate camera-like eye must have been present by the time that lampreys and gnathostomes diverged, around 500 Mya (reference 1); Although the eye varies greatly in adaptative details among vertebrates, its basic structure is the same in all. The human eye is representative of the design typical for a tetrapod. (...) A watery aqueous humor fills the spaces in the eye in front of the lens (...) (reference 2).[well established][VHOG] EHDAA2:0000977 EMAPA:18237 FMA classifies this is a capsule and hence an organ part. In contrast we classify this as acellular FMA:58881 MA:0001300 NCIT:C32975 The transparent membrane which surrounds the lens of the eye. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG] UBERON:0001804 UMLS:C0229232 VHOG:0000550 ZFA:0005574 capsula lentis lens capsule synthesized by the lens epithelium and its main components are Type IV collagen and sulfated glycosaminoglycans (GAGs). [Wikipedia:Capsule_of_lens the elastic, clear, membrane-like structure, that is outer most layer of the lens uberon ectoderm-derived structure lens anterior epithelium acellular membrane structure with developmental contribution from neural crest