2020–2021 BCSC Basic and Clinical Science Course™
2 Fundamentals and Principles of Ophthalmology
Part I: Anatomy
Chapter 1: Orbit and Ocular Adnexa
Orbital Anatomy
Orbital Margin
The orbital margin, or rim, forms a quadrilateral spiral whose superior margin is formed by the frontal bone, which is interrupted medially by the supraorbital notch (Fig 1-2). The medial margin is formed above by the frontal bone and below by the posterior lacrimal crest of the lacrimal bone and the anterior lacrimal crest of the maxillary bone. The inferior margin derives from the maxillary and zygomatic bones. Laterally, the zygomatic and frontal bones complete the rim.
Excerpted from BCSC 2020-2021 series: Section 2 - Fundamentals and Principles of Ophthalmology. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.