Figure 1. Schematic diagram of the curvature of the eyelid margin, surgical design and incision in blepharoptosis surgery.

(A) Normal eyelid margin and varying degrees of ptosis with average measurements in a young child. The different color areas indicate the possible location of the eyelid margin in different ptosis severities. (B) The width of the frontal muscle flap is 12–15 mm, and the height of dissociation depends on the clinical circumstances. The resection of the affected upper eyelid skin was 1–3 mm and the width of the double eyelid fold is 5–7 mm. (C) Representative intraoperative photos.