نتایج جستجو برای: visual defects

تعداد نتایج: 488712  

Journal: :Investigative ophthalmology & visual science 2000
J B Jonas A Bergua P Schmitz-Valckenberg K I Papastathopoulos W M Budde

PURPOSE To describe optic disc variables assessed by evaluation of clinical optic disc photographs and to compare sensitivity and specificity of these optic disc parameters in identifying patients with ocular hypertension who have nerve fiber layer defects and normal visual fields and patients with visual field defects. METHODS The study included 500 normal subjects, 132 patients with ocular ...

Journal: :Archives of ophthalmology 2005
Sohan Singh Hayreh Bridget Zimmerman

OBJECTIVE To evaluate the pattern of various types of visual field defects and their prevalence at initial examination of nonarteritic anterior ischemic optic neuropathy (NA-AION). METHODS The data were compiled from 312 consecutive eyes (in 265 patients) that fulfilled our inclusion and exclusion criteria. A comprehensive ophthalmic evaluation was performed, including recording of visual acu...

Journal: :Stroke 2011
Alex Pollock Christine Hazelton Clair A Henderson Jayne Angilley Baljean Dhillon Peter Langhorne Katrina Livingstone Frank A Munro Heather Orr Fiona J Rowe Uma Shahani

BACKGROUND Visual field defects are estimated to affect 20% to 57% of people who have had a stroke. Visual field defects can affect functional ability in activities of daily living (commonly affecting mobility, reading and driving), quality of life, ability to participate in rehabilitation, and depression, anxiety and social isolation following stroke. There are many interventions for visual fi...

Journal: :بینا 0
علیرضا برادران رفیعی ar baradaran-rafie ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم مهدی اصلانی m aslani 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 حسن پور h hasanpoor ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم مرجان زارع جوشقانی m zare joshaghani 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 جمالی h jamali دانشگاه علوم پزشکی شیراز محمد زارع جوشقانی m zare joshaghani ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranتهران- پاسداران- بوستان نهم- خیابان پایدارفرد (خیابان امیر ابراهیمی)- پلاک 23- مرکز تحقیقات چشم بهرام عین الهی

purpose: to report the outcomes of conjunctival-limbal autograft (clau) in patients with unilateral total limbal stem cell deficiency (lscd) emphasizing surgical problems, complications, and their management. methods: in this prospective interventional case series, clau combined with amniotic membrane transplantation as a graft was performed on 26 patients with unilateral total lscd due to chem...

2018
Alexia Roux-Sibilon Floriane Rutgé Florent Aptel Arnaud Attye Nathalie Guyader Muriel Boucart Christophe Chiquet Carole Peyrin

Primary open-angle glaucoma (POAG) firstly mainly affects peripheral vision. Current behavioral studies support the idea that visual defects of patients with POAG extend into parts of the central visual field classified as normal by static automated perimetry analysis. This is particularly true for visual tasks involving processes of a higher level than mere detection. The purpose of this study...

ژورنال: سلامت کار ایران 2020

Background and aims: Lighting directly and indirectly affects employeeschr('39') mental health and their performance. Good lighting is required for good visibility of the environment and should provide a luminous environment that is human-friendly and appropriate for the visual task performed. Optimal lighting is one of the most important issues in providing the physical conditions of different...

2010
Susie T Luu Andrew W Lee Celia S Chen

BACKGROUND Bilateral stroke following radiofrequency catheter ablation is an unusual complication and may result in bilateral altitudinal visual field defects. Bilateral altitudinal visual field defects usually result from prechiasmal pathology causing damage to both retinas or optic nerves and rarely from bilateral symmetric damage to the post chiasmal visual pathways. CASE PRESENTATION A 48...

2017
Norman Sabbah Nicolae Sanda Colas N. Authié Saddek Mohand-Saïd José-Alain Sahel Christophe Habas Amir Amedi Avinoam B. Safran

Behavioral alterations emerging after central or peripheral vision loss suggest that cerebral reorganization occurs for both the afferented and deafferented early visual cortex (EVC). We explored the functional reorganization of the central and peripheral EVC following visual field defects specifically affecting central or peripheral vision. Compared to normally sighted, afferented central and ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه دانشهای بنیادی (مرکز تحقیقات فیزیک نظری و - پژوهشکده علوم نانو 1392

among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...

Journal: :Investigative ophthalmology & visual science 2005
Gerald McGwin Aiyuan Xie Andrew Mays Wade Joiner Dawn K DeCarlo Tyler Andrew Hall Cynthia Owsley

PURPOSE To evaluate the association between visual field defects in the central 24 degrees field and the risk of motor vehicle collisions (MVCs) among patients with glaucoma. METHODS A nested case-control study was conducted in patients with glaucoma aged 55 or more. Cases were patients who were involved in a police-reported motor vehicle collision (MVC) between January 1994 and June 2000; co...

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