Outcomes of Frontalis Sling Versus Levator Resection in Patients With Monocular Elevation Deficiency Associated Ptosis.

Purpose: To compare outcomes of frontalis sling (FS) silicone and levator resection (LR) in ptosis associated with monocular elevation deficiency.

Methods: Retrospective interventional comparative case series of FS and LR in monocular elevation deficiency associated ptosis. Favorable outcome was defined as difference in margin reflex distance 1 of ≤1 mm between the 2 eyes in unilateral cases and margin reflex distance 1 of 4 mm in bilateral cases at last follow-up visit.

Results: One hundred four eyes of 95 patients were included. Median age at surgery was 14 years, and the mean follow-up period was 19.75 ± 34.55 months. Ptosis was severe in 91 (87.5%) patients. Associated Marcus Gunn jaw-winking (MGJW) phenomenon was seen in 43 (42%) patients. Frontalis sling was performed in 76 (73%) and LR in 28 (27%). Mean pre- and postoperative margin reflex distance 1 were -1.27 ± 2.17 mm and 2.18 ± 1.49 mm (p < 0.0001). The mean improvement in margin reflex distance 1 was significantly more with FS (4.46 ± 2.19) compared with LR (1.85 + 2.5) (p < 0.0001). There were no cases of exposure keratopathy requiring reversal of surgery in either group. The number of resurgeries required was 42 (55%) in the FS group and 10 (36%) (p = 0.08) in the LR group. Favorable outcome was seen in 54 (71%) in FS group and 16 (57%) (p = 0.17) in LR group.

Conclusions: When compared with levator resection, frontalis suspension with silicone gives a better eyelid elevation but has greater regression requiring more resurgeries. In spite of a poor Bells phenomenon, exposure keratopathy is not a concern.