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Optic disc detection

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https://www.readbyqxmd.com/read/29780155/myelin-oligodendrocyte-glycoprotein-igg-positive-recurrent-bilateral-optic-papillitis-with-serous-retinal-detachment-a-case-report
#1
Tomoya Kon, Hiroki Hikichi, Tatsuya Ueno, Chieko Suzuki, Jinichi Nunomura, Kimihiko Kaneko, Toshiyuki Takahashi, Ichiro Nakashima, Masahiko Tomiyama
Autoantibodies against myelin oligodendrocyte glycoprotein (MOG-IgG) have been detected in inflammatory demyelinating central nervous system diseases. A 30-year-old woman had blurred vision, marked optic nerve disc swelling, serous retinal detachment at the macular on optic coherence tomography, and MOG-IgG seropositivity. The patient was thought to have optic papillitis associated with MOG-IgG. Her symptoms rapidly improved after high-dose methylprednisolone therapy. We hypothesize that serous retinal detachment was secondary, arising from optic papillitis...
May 18, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29778487/clinical-characteristics-of-pediatric-optic-neuritis-with-myelin-oligodendrocyte-glycoprotein-seropositive-a-cohort-study
#2
Qian Chen, Guixian Zhao, Yongheng Huang, Zhenxin Li, Xinghuai Sun, Ping Lu, Yan San, Min Wang, Guohong Tian
BACKGROUND: The clinical characteristics of patients with pediatric optic neuritis with seropositive myelin oligodendrocyte glycoprotein antibodies in Asia have not been reported. METHODS: Patients ≤18 years old with acute onset optic neuritis were enrolled. Serum myelin oligodendrocyte glycoprotein and aquaporin-4 antibodies were detected and patients were followed-up for at least six months. The clinical features were evaluated among myelin oligodendrocyte glycoprotein-seropositive optic neuritis, aquaporin-4-seropositive optic neuritis, and double seronegative optic neuritis...
March 13, 2018: Pediatric Neurology
https://www.readbyqxmd.com/read/29775089/detection-of-perimacular-red-dots-and-blots-when-screening-for-diabetic-retinopathy-refer-or-not-refer
#3
Anatolie Baltatescu, Elio Striglia, Marina Trento, Aurora Mazzeo, Franco Cavallo, Lorena Charrier, Massimo Porta
PURPOSE: Detection of microaneurysms and/or microhaemorrhages near the fovea when screening for diabetic retinopathy poses a problem because referral to retinal specialists may alarm patients and unnecessarily burden ophthalmologists. METHODS: Six-month prospective study of patients found to have minimal red lesions within one disc diameter of the fovea when screened for diabetic retinopathy. Two 45° digital photographs, one centred on the macula and the other nasal including the optic disc, were taken for each eye...
May 1, 2018: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29750947/glaucoma-specialist-optic-disc-margin-rim-margin-and-rim-width-discordance-in-glaucoma-and-glaucoma-suspect-eyes
#4
Seung Woo Hong, Helen Koenigsman, Ruojin Ren, Hongli Yang, Stuart K Gardiner, Juan Reynaud, Robert M Kinast, Steven L Mansberger, Brad Fortune, Shaban Demirel, Claude F Burgoyne
PURPOSE: To quantify the variability of 5 glaucoma specialists' optic disc margin (DM), rim margin (RM) and rim width (RW) estimates. DESIGN: Inter-Observer Reliability analysis. METHODS: Clinicians viewed stereo-photos from 214 subjects with glaucoma or ocular hypertension and digitally marked the DM and RM. For each photo, the centroid of each clinician's DM was calculated, and an averaged DMcentroid was determined. The axis between the DMcentroid and the fovea was used to establish twelve 30° sectors...
May 8, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29747089/effects-of-high-intensity-interval-training-on-optic-nerve-head-and-macular-perfusion-using-optical-coherence-tomography-angiography-in-healthy-adults
#5
Boris Schmitz, Pieter Nelis, Florian Rolfes, Maged Alnawaiseh, Andreas Klose, Michael Krüger, Nicole Eter, Stefan-Martin Brand, Florian Alten
BACKGROUND AND AIMS: High-intensity interval training (HIIT) has been identified to be efficient for increasing health-related fitness in general and in lifestyle-induced chronic diseases such as hypertension, obesity and metabolic syndrome. This study aimed to evaluate HIIT effects on optic nerve head (ONH) and macular perfusion in healthy adults using optical coherence tomography angiography (OCTA). METHODS: Fifty-eight healthy participants (22.0 ± 2.02 years, 40 females (69...
April 26, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29740745/a-novel-method-for-retinal-optic-disc-detection-using-bat-meta-heuristic-algorithm
#6
Ahmad S Abdullah, Yasa Ekşioğlu Özok, Javad Rahebi
Normally, the optic disc detection of retinal images is useful during the treatment of glaucoma and diabetic retinopathy. In this paper, the novel preprocessing of a retinal image with a bat algorithm (BA) optimization is proposed to detect the optic disc of the retinal image. As the optic disk is a bright area and the vessels that emerge from it are dark, these facts lead to the selected segments being regions with a great diversity of intensity, which does not usually happen in pathological regions. First, in the preprocessing stage, the image is fully converted into a gray image using a gray scale conversion, and then morphological operations are implemented in order to remove dark elements such as blood vessels, from the images...
May 9, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29727291/machine-learning-based-automatic-neovascularization-detection-on-optic-disc-region
#7
Shuang Yu, Di Xiao, Yogesan Kanagasingam
In this paper, the automatic detection of neovascularization in the optic disc region (NVD) for color fundus retinal image is presented. NV is the indicator for the onset of proliferative diabetic retinopathy and it is featured by the presence of new vessels in the retina. The new vessels are fragile and pose a high risk for sudden vision loss. Therefore, the importance of accurate and timely detection of NV cannot be underestimated. We propose an automatic image processing procedure for NVD detection that involves vessel segmentation using multilevel Gabor filtering, feature extraction of vessel morphological features and texture features, and image classification with support vector machine...
May 2018: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/29706619/microperimetry-and-optical-coherence-tomography-imaging-in-the-fellow-eye-of-patients-with-unilateral-focal-ischaemic-glaucoma
#8
Imran H Yusuf, Jasleen K Jolly, Gokulan Ratnarajan, John F Salmon
PURPOSE: To determine whether microperimetry or optical coherence tomography (OCT) imaging can detect early disease in the fellow eye of patients with unilateral focal ischaemic glaucoma. METHODS: Thirty-seven consecutive adult patients with unilateral focal ischaemic glaucoma with a unilateral split-fixation visual field defect on standard automated perimetry (SAP) with normal SAP in the fellow eye were selected. All patients underwent microperimetry (MAIA, CenterVue, Italy) of the central 10 degrees and OCT imaging (Spectralis, Heidelberg Engineering, Germany) of the retinal nerve fibre layer of both eyes...
April 30, 2018: Eye
https://www.readbyqxmd.com/read/29705057/patterns-of-progressive-ganglion-cell-inner-plexiform-layer-thinning-in-glaucoma-detected-by-oct
#9
Joong Won Shin, Kyung Rim Sung, Sun-Won Park
PURPOSE: To investigate the spatial characteristics and patterns of progressive macular ganglion cell-inner plexiform layer (GCIPL) thinning in glaucomatous eyes assessed by OCT Guided Progression Analysis (GPA). DESIGN: Longitudinal, retrospective, observational study. PARTICIPANTS: Two hundred ninety-two eyes of 192 patients with primary open-angle glaucoma with a mean follow-up of 6.0 years (range, 3.2-8.1 years) were included. METHODS: Macular GCIPL imaging and visual field (VF) examination were performed at 6-month intervals for 3 years or more...
April 25, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29699984/prevalence-of-glaucoma-in-the-australian-national-eye-health-survey
#10
Stuart Keel, Jing Xie, Joshua Foreman, Pei Ying Lee, Mostafa Alwan, Eamonn T Fahy, Peter van Wijngaarden, Jennifer C Fan Gaskin, Ghee Soon Ang, Jonathan G Crowston, Hugh R Taylor, Mohamed Dirani
AIM: To estimate the prevalence of glaucoma in Australia. METHODS: This was a population-based study of 3098 non-Indigenous Australians (50-98 years) and 1738 Indigenous Australians (40-92 years) stratified by remoteness. Each participant underwent a standard examination that included visual field assessment, tonometry and non-mydriatic fundus photography. Two fellowship-trained glaucoma specialists independently assessed relevant case notes (past ocular history, best-corrected visual acuity, frequency doubling technology visual fields, Van Herick grade, intraocular pressure and optic disc-centred photographs) and assigned a diagnosis ranked on a scale of certainty: none, possible, probable or definite glaucoma...
April 26, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29689762/diabetic-macular-edema-grading-in-retinal-images-using-vector-quantization-and-semi-supervised-learning
#11
Fulong Ren, Peng Cao, Dazhe Zhao, Chao Wan
BACKGROUND: Diabetic macular edema (DME) is one of the severe complication of diabetic retinopathy causing severe vision loss and leads to blindness in severe cases if left untreated. OBJECTIVE: To grade the severity of DME in retinal images. METHODS: Firstly, the macular is localized using its anatomical features and the information of the macula location with respect to the optic disc. Secondly, a novel method for the exudates detection is proposed...
April 10, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29681489/video-diversion-improves-success-rate-of-fundoscopic-examination-in-children-a-prospective-randomized-controlled-trial
#12
Michael M H Yang, Ash Singhal, Alexander R Hengel, John M Kerr, Godefroy Hardy St-Pierre, Shawn George, Katherine Muir, Paul Thiessen, Paul Enarson
BACKGROUND: Fundoscopy is an important component of the neurological examination as it can detect pathologies such as high intracranial pressure. However, the examination can be challenging in young children. This study evaluated whether playing a video during eye examination improves the success, duration, and ease of pediatric fundoscopy. MATERIALS AND METHODS: This was a prospective, multipractitioner, multiclinic, randomized controlled trial. Patients aged one to four years were recruited in the emergency department, neurology clinic, spinal cord clinic, and general pediatric clinic...
September 14, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/29672246/stromal-keratitis-with-endophthalmitis-caused-by-vittaforma-corneae-in-an-immunocompetent-patient-a-case-report
#13
Lalida Pariyakanok, Vannarut Satitpitakul, Prasart Laksanaphuk, Kitiya Ratanawongphaibul, Chaturong Putaporntip, Somchai Jongwutiwes
PURPOSE: To describe a case of microsporidial stromal keratitis with endophthalmitis in an immunocompetent patient. METHODS: Case reportResults: A 58-year-old HIV-negative man presented with stromal keratitis in his right eye. The patient demonstrated subsequent vitritis, multifocal retinitis and arteritis, and macular edema with recurrent vitreous hemorrhage after therapeutic keratoplasty. Numerous microsporidial spores were detected in corneal tissues by modified trichrome stain...
April 19, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29659172/optic-disc-drusen-understanding-an-old-problem-from-a-new-perspective
#14
REVIEW
Steffen Hamann, Lasse Malmqvist, Fiona Costello
Optic disc drusen (ODD) are acellular deposits located in the optic nerve head of up to 2.4% of the population. They may develop as by-products of impaired axonal metabolism in genetically predisposed individuals, in whom a narrow scleral canal is hypothesized to play a role. Although ODD are often considered as benign innocent bystanders, recognized as part of a routine ophthalmological examination, the vast majority of patients with ODD have visual field defects. Optic disc drusen (ODD)-associated complications with severe visual loss, most often due to anterior ischaemic optic neuropathy, are also known to occur...
April 16, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29655645/proton-beam-irradiation-a-safe-procedure-in-post-equatorial-extraocular-extension-from-uveal-melanoma
#15
Ira Seibel, Aline I Riechardt, Katharina Erb-Eigner, Alexander Böker, Dino Cordini, Jens Heufelder, Antonia M Joussen
PURPOSE: This study was performed to show long-term outcomes concerning metastasis rates and local recurrence rates after primary proton beam therapy in uveal melanoma with posterior extraocular extension (EOE) with the main focus on optic nerve invasion. DESIGN: Retrospective case series METHODS: All patients treated with primary proton beam therapy for choroidal or ciliary body melanoma with posterior EOE between July 1998 and August 2010 were included. EOE was either detected upon sonography at primary examination or during the surgical application of tantalum clips onto the sclera...
April 12, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29649006/the-influence-of-volume-and-anatomic-location-of-optic-disc-drusen-on-the-sensitivity-of-autofluorescence
#16
Frederik Cornelius Loft, Lasse Malmqvist, Anne-Sofie Wessel Lindberg, Steffen Hamann
BACKGROUND: Optic disc drusen (ODD) are acellular deposits in the optic nerve head. ODD can be diagnosed using different imaging modalities, including enhanced depth imaging optical coherence tomography (EDI-OCT) and autofluorescence (AF). It is unknown which factors determine the sensitivity of AF. The aim of this study was to investigate the effect of volume and anatomic location of ODD on the sensitivity of AF. METHODS: Cross-sectional study. RESULTS: A total of 38 patients (75 eyes) with ODD were included...
April 11, 2018: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29629238/validation-of-the-unc-oct-index-for-the-diagnosis-of-early-glaucoma
#17
Jean-Claude Mwanza, Gary Lee, Donald L Budenz, Joshua L Warren, Michael Wall, Paul H Artes, Thomas M Callan, John G Flanagan
Purpose: To independently validate the performance of the University of North Carolina Optical Coherence Tomography (UNC OCT) Index in diagnosing and predicting early glaucoma. Methods: Data of 118 normal subjects (118 eyes) and 96 subjects (96 eyes) with early glaucoma defined as visual field mean deviation (MD) greater than -4 decibels (dB), aged 40 to 80 years, and who were enrolled in the Full-Threshold Testing Size III, V, VI comparison study were used in this study...
April 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29623722/new-visual-field-indices-of-disharmony-for-early-diagnosis-of-glaucoma-alone-or-associated-with-conventional-parameters
#18
Rodrigo Abreu-Gonzalez, Marta Gonzalez-Hernandez, Cristina Pena-Betancor, Paloma Rodriguez-Esteve, Manuel Gonzalez De La Rosa
PURPOSE: To evaluate the specificity of new perimetric indices based on harmony, alone and in combination with structural data, for glaucoma detection. METHODS: In this prospective observational cross-sectional study, one eye of 105 healthy subjects and 97 early and suspect glaucomas were sequentially included and examined with Cirrus optical coherence tomography, twice with OCULUS Smartfield perimeter (SPARK strategy) and twice with Humphrey Analyzer (24-2 SITA-Fast) at the Ophthalmology Department from the University Hospital La Candelaria...
April 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29623418/dentin-sealing-and-antibacterial-effects-of-silver-doped-bioactive-glass-mesoporous-silica-nanocomposite-an-in-vitro-study
#19
Jae-Hyun Jung, Dong-Hyun Kim, Kyung-Hyeon Yoo, Seog-Young Yoon, Yeon Kim, Moon-Kyoung Bae, Jin Chung, Ching-Chang Ko, Yong Hoon Kwon, Yong-Il Kim
OBJECTIVES: To synthesize a silver-doped bioactive glass/mesoporous silica nanoparticle (Ag-BGN@MSN), as well as to investigate its effects on dentinal tubule occlusion, microtensile bond strength (MTBS), and antibacterial activity. MATERIALS AND METHODS: Ag-BGN@MSN was synthesized using a modified "quick alkali-mediated sol-gel" method. Demineralized tooth disc models were made and divided into four groups; the following treatments were then applied: group 1-no treatment, group 2-bioglass, group 3-MSN, group 4-Ag-BGN@MSN...
April 6, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29577172/parafoveal-and-optic-disc-vessel-density-in-patients-with-obstructive-sleep-apnea-syndrome-an-optical-coherence-tomography-angiography-study
#20
Laura Moyal, Esther Blumen-Ohana, Marc Blumen, Cybele Blatrix, Frederic Chabolle, Jean-Philippe Nordmann
AIMS: To compare optic disc perfusion, radial peripapillary capillaries (RPC) and macular vascular density, between normal subjects and subjects with obstructive sleep apnea syndrome (OSAS) using spectral-domain OCT angiography (OCTA). METHODS: Sixteen eyes of patients with mild OSAS, 17 eyes with moderate OSAS, 20 eyes with severe OSAS on polygraphy and 28 controls were evaluated with OCTA RT XR Avanti (AngioVue software, Optovue Inc., Fremont, CA). Optic nerve head (ONH), RPC and macular vessel density were measured...
March 25, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
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