PubMed ID: 26669423
Author(s): Struck MC, Larson JC. Surgery for supranuclear monocular elevation deficiency. Strabismus. 2015;23(4):176-81. doi: 10.3109/09273972.2015.1099710. PMID 26669423
Journal: Strabismus, Volume 23, Issue 4, 2015
PURPOSE We report a novel approach to surgery for monocular elevation deficiency (MED).
METHODS A retrospective review of 5 patients undergoing surgery for supranuclear MED between 2003 and 2014. All patients had intact Bell’s phenomenon, hypotropia, limited elevation above the primary position, and negative forced duction testing of the paretic eye. Preoperatively all patients preferred chin-up head posture and three had pseudoptosis or ptosis. One of the 5 had prior vertical muscle surgery. Surgery correction for the MED consisted of near maximal superior rectus recession on the contralateral sound eye.
RESULTS Compensatory chin-up head position and alignment in primary position was improved in all patients. Average age at surgery was 5.3 years. Average superior rectus recession was 9.7 mm. Mean follow-up was 4.8 years (range 12 months to 11.5 years). The vertical deviation of the paretic eye in primary position postoperatively was orthotropic for 2, hypotropic for 2, and overcorrected for 1.
CONCLUSIONS In cases of supranuclear MED (double elevator palsy) contralateral superior rectus recession based on the innervational principle is a simple and reliable alternative surgical approach compared to published results of the Knapp transposition procedure. Additionally, it holds the possibility for decreased complications and less complicated future surgical treatment options.