part of part_of part of part_of luminal space of immaterial entity anatomical entity anatomical space lens vesicle lens vesicle cavity (...) an essentially similar sequence of events occurs during the embryonic development of the vertebrate eye. The eye initially develops as a single median evagination of the diencephalon that soon bifurcates to form the paired optic vesicles. As each optic vesicle grows towards the body surface, its proximal part narrows as the optic stalk, and its distal part invaginates to form a two-layered optic cup. (...) The optic cup induces the overlying surface ectoderm first to thicken as a lens placode and then to invaginate and form a lens vesicle that differentiates into the lens.[well established][VHOG] An anatomical cavity that is part of a lens vesicle. EHDAA2:0000986 EMAPA:17164 UBERON:0005688 VHOG:0000531 cavity of lens cavity of lens vesicle lens cavity uberon