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外伤性眼球陷没,是在眶底骨折或眼球摘除后,由于眶内组织体积减少而引起的。发生机理:(1)眶内脂肪通过破裂的骨膜及骨折间隙疝入上颌窦;(2)眶底骨折移位或伴有眶周围破坏使眶内容量增大;(3)眶脂肪萎缩坏死;(4)眼外肌的挛缩和纤维变性。这些因素可使20～30%的眶底骨折病人在伤后数周至数月内出现眼球陷没。当摘出眼球后,眶内减少6cc的组织,一个球形植入物可补偿2—4cc,义眼占1—2cc,还剩下1～3cc的空缺,眼眶脂肪的萎缩进一步减少了眶内组织,因而导致眼球陷没的发生。治疗: 1.非手术疗法最简便,将美容性薄义眼置于小的或眼球萎缩眼的前面,或调换大些或合适的义眼,均可改善外观。在无功能的患眼或义眼前置一有放大作用的透镜,可使“小眼”看起来像正常大小。
Traumatic eyeball trap, is in orbital floor fracture or enucleation, due to the reduction of orbital tissue volume caused. The mechanism of occurrence: (1) orbital fat through the periosteum and fracture fracture hernia into the maxillary sinus; (2) orbital floor fracture displacement associated with orbital destruction of the orbital volume increased; (3) orbital fat atrophy necrosis; (4) Extraocular muscle contracture and fibrosis. These factors can make 20 to 30% of patients with orbital floor fractures in a few weeks to several months after the eyeball trauma. When the removal of the eye, orbital reduction of 6cc tissue, a spherical implant can be compensated 2-4cc, prosthetic eyes 1-2cc, leaving 1 ~ 3cc vacancy, orbital fat shrinkage further reduce the orbital tissue, Which led to the occurrence of eye trapped. Treatment: 1. Non-surgical treatment is the most simple, the beauty of thin Yiyan placed in front of a small or atrophic eyes, or swap larger or appropriate sense of the eye, can improve the appearance. A non-functioning pre-ophthalmic or prosthetic eye with a magnifying lens can make the “small eye” look like normal size.