نتایج جستجو برای: optic
تعداد نتایج: 45238 فیلتر نتایج به سال:
morning glory syndrome (mgs) is a rare congenital optic disc anomaly characterized by a funnel-shaped, excavated optic disc surrounded by chorioretinal pigmentary disturbance. the main ophthalomoscopic feature of the mgs is enlarged optic disc with a funnel shaped scleral defect; elevated peripapillary chorioretinal pigmentation; and pale fluffy tissue of glial hyperplasia overlying the optic d...
purpose: to describe the association between optic disc traction and non-arteritic anterior ischemic optic neuropathy (naion). methods: eighty three eyes of 83 patients with naion were evaluated by optical coherence tomography (oct) for detecting vitreous adhesion to the optic nerve head with separation from adjacent retina (partial posterior vitreous detachment). those who were negative for su...
introduction: demyelination is one of the main causes of neurological disability. it is the end product of numerous pathological processes, multiple sclerosis (ms) being the most common cause. more than 70% of the ms patients suffer from optic disturbances. this disease commonly affects the optic pathway, particularly the optic nerves and chiasm. several attempts have been made to produce a sui...
purpose : to evaluate orbital blood flow velocities and optic nerve diameter with doppler and gray-scale sonography in patients with acute unilateral optic neuritis (on) methods : orbital doppler and gray-scale sonography was performed in 46 eyes of 23 patients aged 19-47 with acute unilateral on. on was diagnosed by an ophthalmologist on the basis of clinical presentation, presence of decrease...
introduction: multiple sclerosis is a progressive neurological disease is most common in young adults. this disease has created many problems for patients and it leads to disability and dependence in life. clinical findings indicate that mental stress of everyday life events gradually work different body systems including the immune system is affected and can weaken it. various factors can modu...
therapeutic effects of high dose intravenous prednisolone on methanol induced toxic optic neuropathy
background: the effects of high dose steroids for the treatment of methanol optic neuropathy was evaluated in this study. methods: in an interventional case series, 9 patients with a history of sudden visual loss after an ingestion of homemade alcoholic beverages were included in the study. the patients received 250 mg intravenous methyl prednisolone every 6 hours for 4 days continued with oral...
optic neuritis occurs in young patients, most often females, and presents as subacute monocular visual loss. periocular pain, particularly with eye movement occurs in the majority of cases. the retrobulbar form occurs in 65% of cases and is associated with normal optic disc appearance at onset. the central visual field is usually affected and an rapd and dyschromatopsia are present. brain magne...
background :there is not any data available about the effect of high bar pressure condition on intracranial pressure. in this study, the effect of diving on the optic nerve and sheath diameters as non-invasive markers of intracranial pressure has been investigated. methods : twenty professional male divers from twenty one volunteers were chosen for this cross-sectional study. only one person ...
Purpose: To report a case of unilateral severe visual loss and bilateral optic disc cupping secondary to brain metastasis of bronchogenic carcinoma Patient and findings: A 48 year-old woman presented with severe visual loss of left eye without redness or pain or any systemic findings .Clinical findings included decreased visual acuity of left eye to 4 m CF and (+3) positive Marcus-Gunn refle...
Purpose: This work studies possible role of FOS proteins, retinoic acid (RA) and mitogens during optic vesicle development in vitro. Materials and Methods: Fos was detected as a product of 55-62 kDa in optic vesicles via electrophoretic procedures. Incubation (24hr) of optic vesicles with RA 25nM and mitogens(serum10%,insulin2.5%) on the day 9.5 of gestation revealed that Fos was induced by mi...
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