نتایج جستجو برای: optic disc duplication

تعداد نتایج: 106640  

Journal: :Current eye research 1996
S Miglior L Brigatti C Lonati L Rossetti C Pierrottet N Orzalesi

Visual field test and optic disc evaluation are the standard examination techniques used to detect the onset and progression of glaucoma. This explorative study was performed to assess the temporal correlation between visual field and optic disc changes in eyes with ocular hypertension and well-established glaucoma. Eighty-six hypertensive and 16 glaucomatous eyes were followed up for a period ...

Journal: :Investigative ophthalmology & visual science 2005
Ioannis K Petropoulos Jean-Antoine C Pournaras Jean-Luc Munoz Constantin J Pournaras

PURPOSE Acetazolamide was previously shown to increase optic disc partial pressure of oxygen (PO(2)). The study was conducted to evaluate optic disc PO(2) variations during normoxia, hyperoxia (100% O(2)), and carbogen breathing (95% O(2), 5% CO(2)), before and after intravenous administration of acetazolamide. METHODS PO(2) measurements were obtained at intervascular areas of the optic disc ...

Journal: :Archives of ophthalmology 2009
Alicia C S How Gavin S W Tan Yiong-Huak Chan Tina T L Wong Steve K Seah Paul J Foster Tin Aung

OBJECTIVE To determine the prevalence of tilted and torted optic discs and associated risk factors among Chinese adults in Singapore. METHODS As part of a population-based survey, optic disc stereophotographs of both eyes were obtained, and left eyes were analyzed using imaging software. A tilted optic disc was defined as an index of tilt (ratio of minimum to maximum optic disc diameter) less...

2011
H Yu S Barriga S Echegaray

Optic disc (OD) and fovea locations are two important anatomical landmarks in automated analysis of retinal disease in color fundus photographs. This paper presents a new, fast, fully automatic optic disc and fovea localization algorithm developed for diabetic retinopathy (DR) screening. The optic disc localization methodology comprises of two steps. First, the OD location is identified using t...

Journal: :The British journal of ophthalmology 1997
J H Meyer M Guhlmann J Funk

AIMS To find out whether the size of the blind spot area, determined by static perimetry, depends on the surface topography of the optic disc and its surrounding area. METHODS Ten eyes were examined; all had a parapapillary atrophy adjacent to the temporal side of the disc. Microperimetry was performed under direct fundus control using a Rodenstock scanning laser ophthalmoscope. The horizonta...

2016
Karine D. Bojikian Chieh-Li Chen Joanne C. Wen Qinqin Zhang Chen Xin Divakar Gupta Raghu C. Mudumbai Murray A. Johnstone Ruikang K. Wang Philip P. Chen

PURPOSE To investigate optic disc perfusion differences in normal, primary open-angle glaucoma (POAG), and normal tension glaucoma (NTG) eyes using optical microangiography (OMAG) based optical coherence tomography (OCT) angiography technique. DESIGN Cross-sectional, observational study. SUBJECTS Twenty-eight normal, 30 POAG, and 31 NTG subjects. METHODS One eye from each subject was scan...

Journal: :Investigative ophthalmology & visual science 2008
Paul Healey Francis Carbonaro Bronwen Taylor Tim D Spector Paul Mitchell Christopher J Hammond

PURPOSE To examine the roles of genetic and environmental factors in the optic disc in a classic twin study. METHODS Five hundred six pairs of twins were recruited to participate from the Twins U.K. Adult Twin Registry at St. Thomas' Hospital, London. Photographs of the optic disc were obtained, and the covariance of optic disc, cup, and rim areas within monozygotic (MZ) and dizygotic (DZ) pa...

Journal: :Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie 2014
Laurenţiu Coman Monica Costescu Mihail Alecu Oana Andreia Coman

The purpose of this study was to evaluate the relationship between central corneal thickness (CCT) and optic disc morphology in normal tension glaucoma (NTG). Patients with NTG underwent eye examination, optic disc imaging with Heildelberg Retina Tomograph II (HRT II) and ultrasound corneal pachymetry. The morphological parameters of the optic discs were used to classify the eyes into four grou...

2017
Lina Zhang Yuming Xu Yu Zhu

This study was to analyse the degeneration of the Retinal Nerve Fiber Layer (RNFL) and optic disc and the relationship between optic nerve damage and the severity of cognitive impairment in patients with Alzheimer’s disease (AD) and Mild Cognitive Impairment (MCI). The RNFL thickness and optic disc variables were assessed by optical coherence tomography in patients with MCI and AD and control s...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید