Gioia V M, Linberg J V, McCormick S A
Arch Ophthalmol. 1987 Apr;105(4):529-32. doi: 10.1001/archopht.1987.01060040099042.
This report documents the anatomy of the lateral canthus using gross dissection, histologic examination, computed tomography, magnetic resonance imaging, and clinical measurement. Lateral canthal dissections of 16 cadaver orbits demonstrated a well-defined attachment of the tarsal plates to the orbital rim, averaging 10.6 mm in length and 10.2 mm in width at their insertion on Whitnall's tubercle, 1.5 mm behind the orbital rim and 9.7 mm inferior to the frontozygomatic suture. Histologic examination showed a band of dense fibrous tissue attached to the tarsal plates, with intermingled muscle fibers from the pretarsal orbicularis oculi muscle. A small pocket of fat was identified posterior to the orbital septum and anterior to the lateral canthal tendon. Clinical measurements of normal adults revealed 2 mm of lateral movement of the canthal angle during abduction, apparently caused by posterior fibrous attachments to the check ligament of the lateral rectus muscle.
本报告通过大体解剖、组织学检查、计算机断层扫描、磁共振成像及临床测量，记录了外眦的解剖结构。对16具尸体眼眶进行的外眦解剖显示，睑板与眶缘有明确的附着，在其附着于惠特纳尔结节处，平均长度为10.6毫米，宽度为10.2毫米，位于眶缘后方1.5毫米及额颧缝下方9.7毫米处。组织学检查显示，一条致密纤维组织带附着于睑板，并有来自睑前眼轮匝肌的肌纤维与之混合。在眶隔后方及外眦肌腱前方发现一小片脂肪。对正常成年人的临床测量显示，外展时眦角有2毫米的侧向移动，这显然是由外侧直肌节制韧带的后部纤维附着所致。
