Ad
related to: optic nerve damage recovery procedure
Search results
Results from the WOW.Com Content Network
The optic nerve can be damaged when exposed to direct or indirect injury. Direct optic nerve injuries are caused by trauma to the head or orbit that crosses normal tissue planes and disrupts the anatomy and function of the optic nerve; e.g., a bullet or forceps that physically injures the optic nerve.
In X-shaped and Y-shaped, the arms run the risk of the being pulled medially, which would press on the optic nerve and could result in optic nerve atrophy. In single strip support, the material covers the posterior pole vertically between the optic nerve and insertion of the inferior oblique muscle.
The exact mechanism of optic nerve ischemia in these cases remains unclear, but contributing factors may include hypotension, anemia, hypoxia, and changes in the autoregulation of optic nerve arterial blood flow. The incidence of ischemic optic neuropathy leading to vision loss following general surgeries ranges between 0.1% and 0.002%.
The anterior optic nerve receives blood primarily from the posterior ciliary arteries. The anterior optic nerve, a.k.a. the optic nerve head, is surrounded by the scleral canal, and is vulnerable to crowding of nerve fibers. The portion of the optic nerve head that is visible by looking into the eye with an ophthalmoscope is called the optic disc.
The optic nerve is the bundle of axons that carry the visual signals from the eye to the brain. This optic nerve must penetrate through the wall of the eye, and the hole to accommodate this is usually 20-30% larger than the nerve diameter. In some patients the optic nerve is nearly as large as the opening in the back of the eye, and the optic ...
Toxic optic neuropathy refers to the ingestion of a toxin or an adverse drug reaction that results in vision loss from optic nerve damage. Patients may report either a sudden loss of vision in both eyes, in the setting of an acute intoxication, or an insidious asymmetric loss of vision from an adverse drug reaction.
A penetrating globe injury with a retained foreign object, called an intraocular foreign body, has a different prognosis than a simple penetrating trauma. Therefore, intraocular foreign body injuries are considered a distinct type of ocular injury. [4] Open-globe injuries are also classified by the anatomic region or zone of injury:
Cataract surgery: Restoring vision by removing an eye lens that has become opaque; Corneal transplantation: Replacing a damaged or diseased cornea with a donor cornea, a form of organ transplantation; Glaucoma surgery: Various procedures treat glaucoma, which affects the optic nerve; LASIK: Surgery for the correction of myopia, hyperopia, and ...
Ad
related to: optic nerve damage recovery procedure