The Palpebral fissure is smaller than its fellow, and the eyeball sinks into the orbit.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
I noticed, however, what I should call a Palpebral spasm, affecting the eyelid and muscles of one side, which, if it were intended for the facial gesture called a wink, might lead me to suspect a disposition to be satirical on his part.
"The Complete PG Works of Oliver Wendell Holmes, Sr."
Oliver Wendell Holmes, Sr. (The Physician and Poet not the Jurist)