Upper Eyelid Contour Changes After Müller's Muscle Conjunctiva Resection

Area of Science:

• Ophthalmic surgery
• Plastic surgery

Background:

• Ptosis correction often involves Müller's muscle conjunctiva resection (MMCR).
• Variations in surgical technique may impact upper eyelid contour outcomes.

Purpose of the Study:

• To analyze upper eyelid contour changes following Müller's muscle conjunctiva resection (MMCR).
• To compare outcomes across four surgeons performing MMCR.

Main Methods:

• Comparative cross-sectional analysis of 88 upper eyelids from 65 patients.
• Pre- and postoperative lid contours were measured using Bézier lines.
• Analysis included patients with and without significant preoperative ptosis.

Main Results:

• Müller's muscle conjunctiva resection (MMCR) corrected the lateral eyelid contour in all groups.
• Significant medial ptosis preoperatively was associated with undercorrection of the nasal lid contour post-MMCR.
• Surgical instruments for posterior lamella entrapment varied among surgeons.

Conclusions:

• The extent of medial tissue resection is critical in Müller's muscle conjunctiva resection (MMCR).
• Adequate medial resection is essential to prevent postoperative nasal undercorrection, regardless of the instrument used.