part_of adult synganglion subesophageal region adult synganglion optic ganglion A region of the subesophageal region of the synganglion that contains neurons that communicate with the eyes via the optic nerves. Axons from the eyes communicate with association neurons in the optic lobes. Fig. 14-3, in Biology of Ticks ISBN:0-19-505910-7. TADS:0000305 TADS:0000305 default_namespace