Fig. 1
From: Comparing the symmetry of upper eyelid following unilateral ptosis correction
An example of a patient whose preoperative and postoperative clinical photographs was employed in Image J software and bilateral eyelid contours were extracted and coordinates of eyelid parameters were obtained. Using vertical and horizontal lines passing through corneal light reflex, pupil center, MRD1, peak of the upper lid, temporal and nasal ocular surface areas are easily identifiable