[Upper and lower eyelid position in different degrees of downgaze and upgaze].

Purpose: To quantify the relation between eye and eyelids placement in different positions during downgaze and upgaze in healthy subjects.

Methods: The position of the eye and eyelids of 10 healthy individuals was quantified by palpebral fissure image processing with NIH Image software. Upper and lower mid-pupil margin distance was measured in 7 positions: -30, -20, -10, 0, +10, +20 and +30 degrees (positive signs correspond to upgaze and negative signs to downgaze) along vertical meridian.