电镜下，破骨细胞(osteoclast)贴近骨基质的一侧有许多不规则的指状突起，粗细不均，它是紧贴骨组织一侧细胞膜内陷很深的质膜内褶，并非微绒毛，称为皱褶缘(ruffled border)。 在破骨细胞溶骨过程中，骨内无机矿物质被皱褶缘吞饮，于皱褶缘基质内形成一些吞饮泡或吞噬泡。而当破骨细胞离开骨表面后，其皱褶缘消失，破骨细胞内发生变化，进入静止期。
结论重睑者重睑线与睑缘间有皮肤皱褶是一种常见的，并较易被人们接受的美学表现。
Conclusion the double eyelids person with skin fold between double eyelids line and palpebral edge is a common aesthetic phenomenon and accepted by the people.
方法根据上睑缘血管网上缘及自然上睑体表皱褶为标准设计650例重睑手术。
Both nature upper eyelid goffer and upper vessel net of margo palpebrae were used as a datum line. According to the base line, double eyelid plasty was performed.
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