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In anatomy, the orbit is the cavity or socket/hole of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, [1] or it can also be used to imply the contents. [2]
The orbit is the bony cavity that contains the eyeball, muscles, nerves, and blood vessels, as well as the structures that produce and drain tears. Each orbit is a pear-shaped structure that is formed by several bones.
- James Garrity
- 1654 min
- Orbital Foramina, Ducts, Canals, and Fissures
- Periorbital Sinuses
- Reference
Foramina
1. Optic foramen: middle cranial fossa to orbital apex, through lesser wing of sphenoid bone 1.1. Optic nerve 1.2. Ophthalmic artery 1.3. Sympathetics (from carotid plexus) 2. Supraorbital foramen/notch: medial third of superior margin of orbit 2.1. Blood vessels 2.2. Supraorbital nerve (V1) 3. Anterior ethmoidal foramen: at frontoethmoidal suture 3.1. Anterior ethmoidal vessels 3.2. Anterior ethmoidal nerve 4. Posterior ethmoidal foramen: junction of orbital roof and medial wall 4.1. Posteri...
Nasolacrimal Duct
1. Connects lacrimal fossa to inferior meatus of nose
Infraorbital Canal
1. From infraorbital groove and exits 4 mm below inferior orbital margin 2. Transmits infraorbital nerve (V2)
Route for spread of infectionInferomedial orbital strut:along inferonasal orbit, near the ostium of maxillary sinusFovea ethmoidalis: forms roof of ethmoid sinus, lateral extension of cribriform plateBasic and Clinical Science Course, Section 2. Fundamentals and Principles of Ophthalmology. American Academy of Ophthalmology. San Francisco: 2018-2019 edition, 5-11.
Jul 2, 2019 · The eyes (“globes”) are housed in bilateral orbital cavities, two symmetric, pear-shaped depressions in the anterior mid-skull, with large openings anteriorly to permit vision, and small ones posteriorly for communication with the cranial cavity. Each orbit is formed by seven interconnected bones.
- Daniel S. Casper, Janet R. Sparrow
- 2019
Sep 14, 2021 · Page ID. Vision is the special sense of sight that is based on the transduction of light stimuli received through the eyes. The eyes are located within either orbit in the skull. The bony orbits surround the eyeballs, protecting them and anchoring the soft tissues of the eye (Figure 13.4.1 13.4. 1).
Jan 30, 2016 · The orbital floor consists of three bones: the palatine, the zygomatic, and the maxillary bones. The lacrimal fossa is formed by the maxillary and lacrimal bones, which contains the nasolacrimal duct. The inferior oblique muscle originates from the orbital floor, lateral to the nasolacrimal duct.
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Orbital Anatomy. The orbital cavities are large bony sockets that house the eyeballs with associated muscles, nerves, blood vessels and fat. Each orbit is pear-shaped with the optic nerve representing the stem. The medial walls of the orbit are almost parallel and border the nasal cavity anteriorly. The lateral walls, however, diverge at an ...
