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R. Vasaiwala, J. Abbasian, P. Setabutr, A. Putterman, K. Sajja; Postoperative Upper Lid Symmetry Following Müller's Muscle-Conjunctival Resection Procedure for the Treatment of Moderate Blepharoptosis. Invest. Ophthalmol. Vis. Sci. 2009;50(13):4823.
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To evaluate the efficacy of Müller’s muscle-conjunctival resection procedure in attaining upper lid symmetry following the treatment of moderate blepharoptosis (defined as upper lid deviation greater than 2 mm).
173 patients who underwent unilateral or bilateral Müller’s muscle-conjunctival resection procedure for the treatment of blepharoptosis between January 2004 and February 2008 were identified through retrospective chart view. Of these 173 patients, 128 (206 lids) had greater than 2 mm of blepharoptosis from an ideal upper lid position (margin to reflex distance [MRD1] of 3 mm). From this group, 17 patients (20 lids) with greater than 2 mm difference in blepharoptosis between the upper lids were identified. MRD1 of the upper lids, as well as the difference between the MRD1 of the upper lids, were measured pre- and post-operatively.
The average preoperative and postoperative MRD1 measurements in the 17 patients were 0.13 mm and 3.73 mm, respectively. The average difference in MRD1 was 3.2 mm preoperatively and 0.66 mm postoperatively. 15/17 (88%) patients had less than 1 mm difference in MRD1 following the procedure. These results were then compared to the measurements for the larger group of 128 patients. In this group, the average preoperative and postoperative MRD1 measurements were -0.24 mm and 3.13 mm, respectively. The average difference in MRD1 was 1.01 mm preoperatively and 0.57 mm postoperatively. 115/128 (90%) of these patients had less than 1 mm difference in MRD1 following the procedure. The above results were statistically significant with a P value <0.0001.
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