نتایج جستجو برای: optic effect

تعداد نتایج: 1682311  

Journal: :بینا 0
محسن آذرمینا m azarmina ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم حسین آذرمینا h azarmina دانشگاه آزاد اسلامی

toxic optic neuropathy (ton) is a group of medical disorders which can be defined by visual impairment due to optic nerve damage by a toxin. the exposure to a toxic substance can occur at the workplace, with ingestion of materials/ foods containing a toxin, or the use of systemic medications. ton is a disease entity which is not only under-diagnosed, but also often diagnosed at a stage when rec...

M Jalali MR Nikravesh

Coriandrum sativum (coriander) has been documented as a traditional treatment of diabetes. On the base of this belief and as the studies about whether coriander reduces hyperglycemia in diabetic mice is little known are lacking, we decided to evaluate the effect of Aqueous Extract seed of Coriander on optic nerve in Balb/c Diabetic Mouse. In the present study, the beta cells of pancreas of 16 b...

Accurately detection of retinal landmarks, like optic disc, is an important step in the computer aided diagnosis frameworks. This paper presents an efficient method for automatic detection of the optic disc’s center and estimating its boundary. The center and initial diameter of optic disc are estimated by employing an ANN classifier. The ANN classifier employs visual features of vessels and th...

M Jalali MR Nikravesh

Coriandrum sativum (coriander) has been documented as a traditional treatment of diabetes. On the base of this belief and as the studies about whether coriander reduces hyperglycemia in diabetic mice is little known are lacking, we decided to evaluate the effect of Aqueous Extract seed of Coriander on optic nerve in Balb/c Diabetic Mouse. In the present study, the beta cells of pancreas of 16 b...

Introduction: Nogo-A and Nogo receptor (NgR) are expressed in the subventricular zone (SVZ) stem cells. NgR plays critical inhibitory roles in axonal regeneration and remyelination. However, the role of NgR in SVZ niche behaviors in demyelination context is still uncertain. Here we investigated the effects of NgR inhibition on SVZ niche reaction in a local model of demyelination in adult mouse ...

Journal: :iranian red crescent medical journal 0
peyman petramfar department of neurology, school of medicine, shiraz university of medical sciences, shiraz, ir iran farideh hosseinzadeh student research committee, shiraz university of medical sciences, shiraz, ir iran s. saeed mohammadi student research committee, shiraz university of medical sciences, shiraz, ir iran; student research committee, shiraz university of medical sciences, shiraz, ir iran. tel: +98-9364402630, fax: +98-7733444844

conclusions demyelinating disease, anterior ischemic optic neuropathy, non-arteritic anterior ischemic optic neuropathy, autoimmune disease, and hereditary optic neuropathy could cause optic neuropathy. normal cbc parameters and the absence of clinical manifestations of vitamin b12 deficiency could not rule out its diagnosis. careful physical examinations and history-taking with a classical app...

Journal: :بینا 0
محمد پاکروان m pakravan تهران- پاسداران- بوستان نهم- بیمارستان لبافی نژاد- مرکز تحقیقات چشم آرش انیسیان a anisian تهران- پاسداران- بوستان نهم- بیمارستان لبافی نژاد- مرکز تحقیقات چشم

purpose: to evaluate the relationship between central corneal thickness (cct) and optic disc area in patients with primary open angle glaucoma (poag). methods: the study was performed on patients with poag who were being followed at johns hopkins hospital. all patients underwent thorough eye examination, optic disc imaging with the heidelberg retina tomograph ii (hrt ii), and ultrasound corneal...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
محمدرضا شجاع mr shoja منیژه مهدوی m mahdavi

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 reflex ....

صالحیان نیک , الهام , تفاخری, زهرا, شریفی رضوی , آتنا, فدایی, سحر , فروغی پور , محسن, مقدم احمدی, امیر, پور رشیدی, احمد,

Background and purpose: Optic neuritis is one of the common causes of unilateral or bilateral visual loss. The most common cause of this disorder is demyelinating disease of the central nervous system (CNS) and most of the patients with optic neuritis will present other signs of multiple sclerosis (MS). The diagnosis depends on the clinical findings, however, magnetic resonance imaging (MRI) is...

Journal: :Optics letters 2006
S P Jamison A M MacLeod G Berden D A Jaroszynski W A Gillespie

The electro-optic effect between an ultrafast optical probe pulse and an ultrashort terahertz pulse is shown to depend on the time derivatives of the product of the probe and terahertz electric fields. Application of this theory to temporally resolved single-shot terahertz detection techniques, where the electro-optic effect is temporally localized within an optical probe pulse, shows that the ...

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