part of develops from ends during starts during eye xenopus_anatomy XAO:0000179 The organ of sight (visual apparatus), almost spherical in shape. At the end of development (NF stage 66) the eyes bulge out of their orbital capsules near the lateral edge of the dorsal side of the head. UBERON:0000019 eyes central nervous system optic vesicle death head cavitated compound organ visual system NF stage 28