As primates, for whom facial expressions provide key social and emotional information , we continually probe each other's eyes for positive or negative mood signs. We are acutely aware of being noticed by strangers . True feelings . Eyes appear in the human embryo by ca. 22 days of age.
Eyes convey unpleasant feelings through closed eyelids and an averted gaze.
Might want to consider adding to your Dictionary. Suddenly narrowed or slitted eyes may reveal disagreement or uncertainty . Neuro-notes II .