Optic nerve avulsion
WebFeb 16, 2024 · Optic nerve function. Normal optic nerve function is to send signals from the eye to the brain, working as a messenger to help us determine what we see. When light … WebOptic nerve avulsion is a form of anterior indirect traumatic optic neuropathy evoked by a sudden severe rotation at the junction of the optic nerve and globe induced, in this case, by penetration of the finger into the nasal orbit. A 17-year-old woman was poked in the right eye by an opponent's finger during a water polo game.
Optic nerve avulsion
Did you know?
WebFundus examination revealed an avulsed optic nerve with venous blood emanating from the optic canal. Additionally, the retina was completely opacified, consistent with a … WebUltrasonography has suggested avulsion in 2 other cases of which we are aware. 1,2 Our case demonstrates ultrasonographic findings that aid diagnosis of complete optic nerve avulsion when the optic nerve head is …
Avulsion of the optic nerve head can occur from direct or indirect force resulting in a traumatic optic neuropathy. Direct injury to the optic nerve head, from a penetrating orbital injury, is thought to be less common. Indirect injury can be from rapid torsional force to the globe resulting in shearing at the optic nerve head. WebAn avulsion of the optic nerve and/or extraocular muscle(s) following the globe luxation may be from sharp objects, or a bony fragment that may transect that the optic nerve, …
WebJun 21, 2024 · Traumatic optic neuropathy (TON) is a specific neurological sequence of traumatic brain injury (TBI). It has a different mechanism than other most neurologic complications of head trauma and its consequences can be devastating. The damage can be from direct penetrating trauma or bone fracture injuring the optic nerve directly or … WebA computed tomographic (CT) scan of the head and orbits showed a high-density material coming directly from the avulsed left optic nerve head in a mushroom pattern, which corresponded to the area of vitreous …
WebResults: A 28-year-old woman, with no previous medical history, had left globe luxation and optic chiasm avulsion after being stabbed directly into the left orbit with the use of the stiletto high heel of a shoe. Automated visual field testing detected a temporal hemianopia in the unaffected eye despite normal central visual acuity. Chiasmal ...
WebJul 10, 2003 · Traumatic optic nerve avulsion: role of ultrasonography Main. Optic nerve avulsion is a rare presentation of ocular trauma. The diagnosis of this entity is often … citrobacter amalonaticus abnormalWebJan 17, 2024 · Traumatic optic nerve injury may lead to almost instantaneous blindness. We describe a case of sight loss after a perforating injury to the eye. The case is unusual in that the patient remained conscious and the trauma to the eye was isolated. A full ophthalmological examination was therefore possible within hours as well as early … dick lowryWebJul 20, 2024 · The exact pathophysiology of traumatic optic neuropathy is poorly understood, although optic nerve avulsion and transection, optic nerve sheath hematoma, … citrobacter amalonaticus biochemicalsWebMay 6, 2024 · Even partial avulsion of the optic nerve can cause severe loss of vision. Given the clinical findings of the anterior segment of the eye and location of ONA in our case, … dick loweryWebNational Center for Biotechnology Information dick lowry obituaryWebNov 8, 2004 · Optic nerve avulsion usually follows severe orbital trauma, but cases have been reported following relatively trivial injury. Vision loss is usually severe and immediate. Ophthalmoscopy shows... citrobacter amalonaticus antibioticsWebAug 26, 2024 · Traumatic optic nerve avulsion is very rare presentation of ocular injuries which are caused by sudden extreme rotation of globe resulting in direct pull on optic nerve. The diagnosis in most of the cases is clinical with typical appearance of excavated optic nerve head surrounded by hemorrhage and engorged retinal vasculature. 1 However, ... citrobacter abscess