APP下载

赫林定律与上睑下垂

2017-12-09祝玮烨杨超邢新

中国美容医学 2017年10期

祝玮烨+杨超+邢新

[摘要]赫林定律(Herings law)认为双眼受到统一的神经支配,即双侧提上睑肌受到的神经支配作用是相同的。对于上睑下垂患者,其下垂侧或下垂更严重一侧会代偿性的引起双侧神经支配作用增强,导致对侧眼睑位置假性抬高。对于这类患者,可以通过抬高试验、遮盖试验、去氧肾上腺素试验来检验术前是否存在假性抬高的现象。现已有报道,认为引起上睑下垂现象的病因很多,包括重症肌无力、甲状腺眼病、动眼神经麻痹等。而对于先天性上睑下垂患者是否会出现赫林现象,目前研究结论不一。同时,优势眼上睑下垂患者比非优势眼上睑下垂患者的赫林现象发生率高。赫林现象可能发生于上睑下垂矫正术前或术后,因此上睑下垂矫正术实施前必须考虑到该现象存在的可能性。

[关键词]赫林定律;上睑下垂;优势眼;上睑成形术;睑缘反射距离

[中图分类号]R777.1 [文献标志码]A [文章编号]1008-6455(2017)10-0131-03

Abstract: According to Herings law, binoculus are supplied by the same innervation. That is, both levator palpabrae muscles are innervated equally. For patients with ptosis, the drooping eyelid may cause enhanced innervation bilaterally, thus result in compensatory elevation of the opposite one. For these patients, raising the test, cover test and phenylephrine test can be carried out to test the existence of pseudo elevation. There have been reports of a large number of causes of ptosis that may cause Herings law, including myasthenia gravis, thyroid disease, oculomotor palsy and so on. There is still controversy about whether congenital ptosis patients may have Herings phenomenon. Those whose eyelid ptosis happen in the dominant eye have higher incidence of Herings phenomenon. Herings phenomenon may occur before or after blepharoplasty, so the possibility of this phenomenon must be considered before the plastic surgery.

Keywords:Herings law; blepharoptosis; dominant eye; blepharoplasty; marginalreflex distance

1868年Ewald Hering提出了赫林定律:“雙眼在实现视觉功能时应被视为一个统一的器官。双眼无需各自独立运动,而是受到统一神经冲动的控制”[1]。根据赫林定律,上睑下垂患者眼睑的下垂会导致双侧提上睑肌受到的神经支配作用同等程度的代偿性增强,并同等程度的抬高双侧上睑。该现象也被称为赫林现象(Herings phenomenon)。赫林定律影响着上睑下垂矫正术后上睑的最终位置和最终的手术效果。

1 赫林定律及其机制

赫林定律是由Ewald Hering在1868年提出的:双眼应被视为统一的器官,任何一侧受到神经支配作用的变化都会对双眼产生同等程度的影响。……

登录APP查看全文