Home » The part of eye that is a messenger of electrochemical signals from eye to brain is called Eye MCQs The part of eye that is a messenger of electrochemical signals from eye to brain is called February 12, 2022 4 Views Q. The part of eye that is a messenger of electrochemical signals from eye to brain is called A. Blood vessel B. Optic nerve C. Iris D. Cornea Answer: Optic nerve