Eye Orbit Anatomy

4 Frontal bone and sinus. The orbital aperture is directed forwards laterally and slightly downwards a characteristic of primates and indeed predators which require binocular vision.

Bones Of The Orbit Orbit Anatomy Anatomy Eye Study

The orbits or eye sockets are bilateral and symmetrical bony cavities in the head.

Eye orbit anatomy. Extraocular muscles connect the eyeball to the orbit and control movement of the eyelid as well as the eye. In this article we shall look at the borders contents and clinical correlations of the bony orbit. The orbit is a confined space bounded by four bony walls.

The orbit which protects supports and maximizes the function of the eye is shaped like a quadrilateral pyramid with its base in plane with the orbital rim. They enclose the eyeball and its associated structures. Anatomy OF ORBIT 1.

Nerves and muscles passing from the apex into the orbit pass forward and laterally Fig. In addition to the eyeball itself the orbit contains the muscles that move the eye blood vessels and nerves. Each orbit is pear-shaped with the optic nerve representing the stem.

Apart from the globe orbital fat and extraocular muscles it contains many important neurovascular structures. In this video the. DEVELOPMENT Orbit develops around the eyeball Orbital walls- derived from cranial neural crest cells which expand to form Frontonasal process Maxillary process Lateral nasal process Maxillary process medial inferior and lateral orbital walls Capsule of forebrain forms orbital roof.

Common anular tendon Zinn. The medial walls of the orbit are almost parallel and border the nasal cavity anteriorly. Illustrations Common tendinous ring.

Seven bones conjoin to form the. Anatomy of the bony orbit of the eye. The lateral walls however diverge at an angle.

The orbital floor is the only wall of the orbit that does NOT contain part of the sphenoid bone. In the adult human the volume of the orbit is 30 millilitres of which the eye occupies 65 ml. Lateral to nasal cavity and paranasal sinuses Medial to infratemporal fossa.

CT Anatomy of the orbit. Some of the common symptoms associated with issues related to the orbit of the eye include swelled-up eyeseyelids painful eye movement reddishpurple eyelids formation of eye bags under the eyes and pain near the eyebrows. 3D video anatomy tutorial on the anatomy of the bones of the orbit of the eye.

The fascial sheath of the eye Tenons fascia orbital fat obliques and bony attachment of the recti provide stability to the eyeball within the orbit and prevent it from sinking or retracting. Orbit can refer to the bony socket or it can also be used to imply the contents. The orbit is the bony eye socket of the skull.

Complications of the eye orbit could vary anywhere from a simple twitching to the development of infectious cellulitis and orbital tumors. Anatomy of the Eye and Orbit new edition builds on the strengths of its predecessors while reflecting the increase in our knowledge since the seventh edition was published over twenty years ago. The development of the eye and accessory visual structures occurs between the 3 rd and 10 th week of embryonic development.

ANATOMY OF ORBIT SIVATEJA CHALLA SSSIHMS 2. Inferior to cranial cavity Above maxillary sinus. The orbital cavities are large bony sockets that house the eyeballs with associated muscles nerves blood vessels and fat.

The orbit is formed by the cheekbone the forehead the temple and the side of the nose. The orbit is approximately 40 mm in height 40 mm in width and 40 mm in depth. The eye is cushioned within the orbit by pads of fat.

The eye The fibrous layer is the outermost layer and consists of the cornea and sclera which are continuous with one another. Any space within the orbit which is not otherwise occupied is filled with orbital fat. The orbital contents comprise the eye the orbital and retrobulbar fascia extraocular muscles cranial nerves II III IV V and VI blood vessels fat the lacrimal gland with its sac and duct the eyelids.

The inferior oblique muscle originates from the orbital floor lateral to the nasolacrimal duct. Eyeball is oriented anteroposteriorly but orbits are angled outward Trace the flow of blood into and out of the orbit and orbital structures. Fibrous tunic external layer.

The larger format of Anatomy of the Eye and Orbit edition permits the use of double columns and gives far greater flexibility to the display of illustrations. 2 Lamina papyracea of the ethmoid bone. In anatomy the orbit is the cavity or socket of the skull in which the eye and its appendages are situated.

The orbit is the bony cavity in the skull that houses the globe of the eye eyeball the muscles that move the eye the extraocular muscles the lacrimal gland and the blood vessels and nerves required to supply these structures. It is intimately related. Extrinsic muscles of eyeball Fascial sheath of eyeball Tenon.

3 Cribriform plate ethmoid. Anatomy of the eye. The lacrimal fossa is formed by the maxillary and lacrimal bones which contains the nasolacrimal duct.

1 Maxillary bone and sinus. 6 Inferior nasal concha. See article titled stability of the eye.

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