Orbit Mastery: Orbital Rim (Frontal, Maxilla, Zygomatic), Internal Bones (Sphenoid, Palatine, Ethmoid, Lacrimal), Supraorbital & Infraorbital Notches, Blowout Fractures, Periorbita, Orbital Apex, Tendinous Ring (Optic Nerve, Ophthalmic Artery), Extraocula

Orbit Mastery: Orbital Rim (Frontal, Maxilla, Zygomatic), Internal Bones (Sphenoid, Palatine, Ethmoid, Lacrimal), Supraorbital & Infraorbital Notches, Blowout Fractures, Periorbita, Orbital Apex, Tendinous Ring (Optic Nerve, Ophthalmic Artery), Extraocular Muscles (Superior, Inferior, Medial, Lateral Rectus; Superior & Inferior Oblique), H-Test, CN III/IV/VI Innervation, Levator Palpebrae Superioris, Superior Tarsal Muscle, Orbicularis Oculi, Ptosis, Medial & Lateral Check Ligaments, Lacrimal Apparatus (Tear Film, Gland, Parasympathetic Pathway), Superior & Inferior Orbital Fissures, Optic Canal, Infraorbital Groove, Danger Triangle Veins, Diplopia, Conjunctiva, Foramina (Supraorbital, Infraorbital) Exam Questions Verified and Provided with Complete A+ Graded Rationales Latest Updated 2026 What 3 bones make up the orbital rim? What 4 bones make up more internal structure What 2 Notches are superior/inferior to orbital rim maxilla (inferior-medial) zygomatic (inferior-lateral) frontal (superior) Internal: Sphenoid (most lateral) Palatine Ethmoid Lacrimal (most medial) Foramen: 1. Supraorbital formaen/notch 2. Infraorbital foramen/notch Diplopia (Double vision) Damage to any border/boundary of the orbit can cause diplopia What bones are usually damaged in an orbital fracture? (HY maybe) floor and medial wall However, the roof and lateral walls can also be fractured What is the contents of the orbit posterior to the orbital septum which are surrounded by a layer of adipose enclosed by specialized extension of periosteum? Periorbita An individual can lose periribital fat due to malnutrition or The lower eyelid fat can prolapse Blowout fracture When pieces of bones become dislodged from an orbital fracture What fissures /grooves are within the orbit 1. Superior Orbital fissure 2. Optic Canal 3. Ethmoidal Foramina 4. Lacrimal Groove 5. Inferior Orbital Fissure 6. Infraorbital Groove 7. Nasolacrimal Canal Orbital Apex What are the 4 muscles What contents are in the tendinous ring? What contents are OUTSIDE the apex of the orbit? 1. Superior Rectus 2. Medial Rectus 3. Inferior Rectus 4. Lateral Rectus Tendinous Ring: 1. Optic n. 2. Ophthalmic a. OUTSIDE the apex (TFL): -Superior Orbital Fissure 1. Trochlear Nerve