« Anatomy of the Eye (Ophthobook.com) Before discussing conditions affecting the eye, we need to review some basic eye anatomy.
Anatomy can be painful for some (personally, I hated anatomy in medical school) so I’m going to keep this simple. Let us start from the outside and work our way toward the back of the eye. Eyelids The eyelids protect and help lubricate the eyes. The eyelid skin itself is very thin, containing no subcutaneous fat, and is supported by a tarsal plate. This tarsal plate is a fibrous layer that gives the lids shape, strength, and a place for muscles to attach. Underneath and within the tarsal plate lie meibomian glands. Eyelid Movement Two muscles are responsible for eyelid movement. CN 3 opens the eye like a pillar CN 7 closes like a fish-hook Conjunctiva.
The Orbit and Ear. The orbit can be studied from the front or from the top.
Volume 2, Chapter 21. Orbital Anatomy and Its Clinical Applications. The orbital apex contains a plethora of vital structures.
A large number of arteries, veins, and nerves pass through several significant foramina. Illustration of the Normal Anatomy of the Human Eye and Orbit from a Sagittal (Cut-Away) Giclee Print by Nucleus Medical Art at AllPosters. Not Available Sorry, the specific item you were looking for is no longer available.
May we recommend the item below instead? Www.allposters.com/-sp/Illustration-of-the-Normal-Anatomy-of-the-Human-Eye-and-Orbit-from-a-Sagittal-Cut-Away-Posters_i9013224_.htm Don't see what you like? The Orbit and Ear. Cranial nerves. Ocular Pathology Study Guide: Where is the ciliary ganglion? The ciliary ganglion (arrow 4) is an important anatomic structure in the posterior orbit because sensory innervation to the anterior eye, parasympathetic axons for the iris to control pupil constriction, and sympathetic fibers pass that innervate the iris dilators and blood vessels.
Ocular Pathology Study Guide: Anatomy of the Eye- A study guide for residents. Imaging in Orbital Fractures. The orbit is a conical structure, with its base facing anterolaterally and its apex originating medially as the inlet of all vital neural and vascular structures via the optic foramen, superior orbital fissure, and inferior orbital fissure.
The anterior rim of the bony orbit, the orbital rim, is formed by orbital processes from the maxilla, zygoma, and frontal bone. See the images below. Eye and orbit. The lateral wall of the orbit is formed by the frontal process of the zygomatic bone and the greater wing of the sphenoid bone. Postacceleration injury, motor vehicle collisions, and violent crimes result in myriad orbital fractures and midfacial fractures. Conventional frontal tomograph of a blow-out fracture. CET 020710 (2).pdf (application/pdf Object) Cranial Nerve 3, pg. 3. Chapter 4: Eye movements. Eye movements are controlled by muscles innervated by cranial nerves III, IV and VI.
In this chapter, the testing of these cranial nerves will be discussed. The most common symptom of damage to these nerves is double vision. The oculomotor nerve has the additional function of control of the pupil and therefore this will be discussed here as well. Eye movements are carefully controlled by other systems. Some of these will be discussed here, while others, such as the vestibular system, will primarily be discussed in other chapters. Cranial nerves III, IV, VI. Oculomotor function can be divided into two categories: (1) extraocular muscle function and (2) intrinsic ocular muscles (controlling the lens and pupil).
Extraocular muscle function. Extraocular Muscles. The extraocular or extrinsic eye muscles, considering their relatively small size, are incredibly strong and efficient.
There are the six extraocular muscles, which act to turn or rotate an eye about its vertical, horizontal, and antero-posterior axes: medial rectus (MR), lateral rectus (LR), superior rectus (SR), inferior rectus (IR), superior oblique (SO), and inferior oblique (IO). Here is a schematic of a left eye, showing how its extraocular muscles insert into the eye: muscle movements. Welcome to ASOPRS. Ophthalmic Plastic & Reconstructive Surgery. If I had – Glaucoma – Dr. Henry Jampel, MD « Justin Bazan, OD Park Slope Eye. Welcome to Insidermedicine’s If I had; where we get a chance to ask an expert what they would do if they had a particular medical condition.This week, we had the opportunity to ask Dr.
Henry Jampel, a world expert in the field of eye disease what he would do if he had glaucoma. Dr. Jampel is a Professor of Ophthalmology at the Wilmer Eye Institute at Johns Hopkins University, and serves as the Associate Editor-in-Chief of ‘Ophthalmology,’ the official journal of the AAO. Dr. Jampel gave us his insight into what patients should do if they are told that they have glaucoma. I’d like to thank Dr. Orbital Floor Fractures (Blowout) Treatment. The orbital floor can be accessed through a conjunctival approach, through cutaneous exposure, or through a transmaxillary approach.
Access to this region allows for exploration and release of displaced or entrapped soft tissue, thereby correcting any extraocular motility disturbances. In addition, repair of the bony defect with removal or repositioning of bony fragments allows for restoration of the partition between the orbit and maxillary antrum, thereby preserving orbital volume and geometry and eliminating impingement of soft tissue structures. Transconjunctival approach The transconjunctival approach can be combined with a lateral canthotomy for exposure of the orbital floor (see image below). Operative photo of fracture repair via transconjunctival approach. Initiate this approach with a curvilinear incision approximately 3 mm below the tarsal plate parallel to lower lid punctum. Cutaneous approach Transantral approach Other approaches Implants. Diagram of the Eye Before and After Dilated Eye Exam [NEI Health Information]
Anatomy of the Eye. Learn about the different parts of the eye. Diagnosis and Treatment of Closed Angle Glaucoma - Animation. 0909_glaucoma.pdf (application/pdf Object) Orbital Floor Fractures (Blowout) Treatment. Anatomy of the Eye. Learn about the different parts of the eye. Diagram of the Eye Before and After Dilated Eye Exam [NEI Health Information]
If I had – Glaucoma – Dr. Henry Jampel, MD « Justin Bazan, OD Park Slope Eye.