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ABSTRACT
Purpose: To examine whether Müller’s-muscle-conjunctival-resection (MMCR) changes the position of the lower eyelid.
Methods: Retrospective controlled-cohort study. All patients who underwent MMCR (study group) or blepharoplasty (control group) between January 2016 and September 2018 were recruited. The data retrieved from the patients’ medical records included demographics, visual-acuity, eyelid parameters and dry-eye parameters before and 3 months after surgery. Frontal photographs of the patient’s eyes in primary position were taken preoperatively and at 3 months postoperatively. The margin-reflex-distance 1 (MRD1) and MRD2 were evaluated. The preoperative and 3 months postoperative MRD1, MRD2,and dry-eye signs and symptoms were compared.
Results: Sixty-nine patients underwent MMCR and 54 patients underwent blepharoplasty during the study period. There were significant changes in MRD2 after MMCR surgery compared to preoperative values (P < .01, paired t-test), but no significant changes in MRD2 after blepharoplasty surgery (P = .091, paired t-test). The mean changes in MRD2 (delta MRD2) were 0.51 in the MMCR group versus (−0.10) in the blepharoplasty group (P = .04, t-test).
Conclusions: The position of the lower eyelid was altered significantly in patients that underwent MMCR surgery. This sequela should be discussed with the patients before surgery and should be considered by physicians when planning ptosis surgery.
List of abbreviations
MMCR: Müller’s muscle-conjunctival resection; MRD 1: margin reflex distance 1; WTW: white-to-white; SPK: superficial punctate keratitis
Acknowledgments
The presentation of the manuscript is described in the book of the 6th Annual Congress of The Israeli Ophthalmological Society but did not presented in this meeting or other meeting.
Authors contributions
The manuscript has been read and approved for submission by all authors. All authors have contributed to preparing the manuscript in accordance with the International Committee of Medical Journal Editors (ICMJE) criteria for authorship. No person or persons other than the authors listed have contributed significantly to the preparation of this manuscript.
Disclosure statement
No conflicting relationship exists for any author.
Statements of ethic
The patients’ data used to support the findings of this study are restricted by the institutional review board of the Sheba Medical Center in order to protect patients’ privacy. Data are available from Prof. Guy Ben Simon for researchers who meet the criteria for access to confidential data.