Abumanhal Muhammad, Alsheikh Osama, Edward Deepak P, Kakizaki Hirohiko
Department of Oculoplastic, Orbital and Lacrimal Surgery, Aichi Medical University Hospital, Nagakute, Japan.
King Khaled Eye Specialist Hospital and Research Center, Riyadh, Saudi Arabia.
Saudi J Ophthalmol. 2025 Jun 25;39(2):125-127. doi: 10.4103/sjopt.sjopt_58_25. eCollection 2025 Apr-Jun.
The orbit is defined as the space posterior to the orbital septum. While the orbital septum's attachment to the bone and soft tissues in the superior and inferior regions has been well documented, its attachment in the medial and lateral canthal areas remains controversial. Consequently, the definition of the orbit in these regions is uncertain. In this study, we aim to precisely define the orbital area.
The orbital septum originates from the arcus marginalis and attaches to the levator aponeurosis several millimeters above the upper tarsal plate.
It similarly arises from the arcus marginalis nasally but extends beyond the orbital margin temporally, reaching the anterior surface of the maxillary bone. The space between the orbital septum and the maxillary bone is called the recess of Eisler. The orbital septum's attachment to the lower eyelid retractors is located several millimeters below the lower tarsal plate.
The orbital septum originates from the anterior lacrimal crest, not the posterior lacrimal crest. In relation to the medial canthal tendon, it faces the posterior surface of this tendon.
The orbital septum originates from the arcus marginalis and attaches to the levator aponeurosis and lower eyelid retractors around the temporal palpebral commissure. It does not attach directly to the orbital tubercle; instead, a space filled with orbital fat exists between the orbital septum and the levator aponeurosis-lower eyelid retractors.
眼眶被定义为眶隔后方的空间。虽然眶隔在上、下区域与骨骼和软组织的附着情况已有充分记录，但其在内眦和外眦区域的附着仍存在争议。因此，这些区域眼眶的定义并不明确。在本研究中，我们旨在精确界定眼眶区域。
眶隔起自眶缘弓，附着于上睑板上方数毫米处的提上睑肌腱膜。
它同样起自鼻侧的眶缘弓，但在颞侧延伸至眶缘之外，到达上颌骨的前表面。眶隔与上颌骨之间的间隙称为艾斯勒隐窝。眶隔与下睑缩肌的附着位于下睑板下方数毫米处。
眶隔起自泪前嵴，而非泪后嵴。相对于内眦韧带，它面向该韧带的后表面。
眶隔起自眶缘弓，附着于颞侧睑裂周围的提上睑肌腱膜和下睑缩肌。它不直接附着于眶结节；相反，在眶隔与提上睑肌腱膜 - 下睑缩肌之间存在一个充满眶脂肪的间隙。
