METHODS: In this cohort study, patients treated with the forked frontalis muscle aponeurosis suspension and levator aponeurosis-Muller\'s muscle complex resection were identified. Lagophthalmos height and lid lag was measured at the postoperative week 1 visits. The Spearman correlation test was run to test whether lagophthalmos was related to patients\' age, levator function, and severity of ptosis. Then we measured the contents of collagen and elastin fibers of frontalis muscle fascia and levator aponeurosis from the patients and levator aponeurosis from cadaver heads histologically and compared the contents in these 3 groups.
RESULTS: No correlation was found between patients\' age, levator function, the severity of ptosis, and with lagophthalmos height. However, the contents of collagen and elastic fibers were both higher in the frontalis fascia than in the normal aponeurosis tissues. The difference in collagen fibers content between frontalis muscle fascia and patients\' aponeurosis was statistically insignificant.
CONCLUSIONS: The severe lagophthalmos and lid lag may be caused by the poor mechanical features of the frontalis muscle. A better source of motive force to elevate the eyelids and a novel sling material with proper elasticity and stiffness would be the solution to improve the lagophthalmos and lid lag after ptosis correction.
方法:在这项队列研究中,
结果:没有发现患者年龄之间的相关性,
结论:严重的眼睑迟滞和眼睑迟滞可能是由于额肌的力学特征差所致。