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Visual field defect

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https://www.readbyqxmd.com/read/28932621/the-scheie-visual-field-grading-system
#1
Prithvi S Sankar, Laura O'Keefe, Daniel Choi, Rebecca Salowe, Eydie Miller-Ellis, Amanda Lehman, Victoria Addis, Meera Ramakrishnan, Vikas Natesh, Gideon Whitehead, Naira Khachatryan, Joan O'Brien
OBJECTIVE: No method of grading visual field (VF) defects has been widely accepted throughout the glaucoma community. The SCHEIE (Systematic Classification of Humphrey visual fields-Easy Interpretation and Evaluation) grading system for glaucomatous visual fields was created to convey qualitative and quantitative information regarding visual field defects in an objective, reproducible, and easily applicable manner for research purposes. METHODS: The SCHEIE grading system is composed of a qualitative and quantitative score...
June 2017: Journal of Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28929241/assessment-of-peripapillary-choroidal-thickness-in-primary-open-angle-glaucoma-patients-with-choroidal-vascular-prominence
#2
Yong Ju Song, Young Kook Kim, Jin Wook Jeoung, Ki Ho Park
PURPOSE: To investigate the relationship between peripapillary choroidal thickness (PCT) and choroidal vascular prominence (CVP) colocalized with retinal nerve fiber layer (RNFL) defect in primary open-angle glaucoma (POAG) eyes and to evaluate the relationship between PCT and POAG severity. METHODS: In this cross-sectional comparative study, 29 POAG patients with CVP on RNFL imaging (Group A), 70 POAG patients without CVP (Group B) and 63 healthy controls (Group C) were examined...
September 19, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28928631/glaucoma-biological-trabecular-and-neuroretinal-pathology-with-perspectives-of-therapy-innovation-and-preventive-diagnosis
#3
REVIEW
Raffaele Nuzzi, Federico Tridico
Glaucoma is a common degenerative disease affecting retinal ganglion cells (RGC) and optic nerve axons, with progressive and chronic course. It is one of the most important reasons of social blindness in industrialized countries. Glaucoma can lead to the development of irreversible visual field loss, if not treated. Diagnosis may be difficult due to lack of symptoms in early stages of disease. In many cases, when patients arrive at clinical evaluation, a severe neuronal damage may have already occurred. In recent years, newer perspective in glaucoma treatment have emerged...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28925373/visualization-and-automatic-detection-of-defect-distribution-in-gan-atomic-structure-from-sampling-moir%C3%A3-phase
#4
Qinghua Wang, Shien Ri, Hiroshi Tsuda, Masako Kodera, Kyoichi Suguro, Naoto Miyashita
Quantitative detection of defects in atomic structures is of great significance to evaluating product quality and exploring quality improvement process. In this study, a Fourier transform filtered sampling Moire technique was proposed to visualize and detect defects in atomic arrays in a large field of view. Defect distributions, defect numbers and defect densities could be visually and quantitatively determined from a single atomic structure image at low cost. The effectiveness of the proposed technique was verified from numerical simulations...
September 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28922031/optic-nerve-head-characteristics-in-chronic-angle-closure-glaucoma-detected-by-swept-source-oct
#5
Dejiao Li, Taibo Li, Eleftherios I Paschalis, Haobing Wang, Elise V Taniguchi, Zi-Ning Choo, Marissa K Shoji, Scott H Greenstein, Stacey C Brauner, Angela V Turalba, Louis R Pasquale, Lucy Q Shen
PURPOSE: To compare structural features in prelaminar and laminar tissues of the optic nerve head (ONH) in chronic angle closure glaucoma (CACG), primary open angle glaucoma (POAG), and control subjects. MATERIALS AND METHODS: ONH imaging was performed using swept-source optical coherence tomography (SS-OCT) for measurements of minimum rim width at Bruch's membrane opening (BMO-MRW), horizontal, and vertical lamina cribrosa depth (LCD). Prelaminar defects, categorized as hole and wedge, and lamina cribrosa (LC) defects were identified...
September 18, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28915256/optical-coherence-tomography-angiography-of-the-peripapillary-capillaries-in-primary-open-angle-and-normal-tension-glaucoma
#6
Ryoko Igarashi, Shun Ochiai, Yuta Sakaue, Aki Suetake, Ryu Iikawa, Testuya Togano, Fuuko Miyamoto, Daiki Miyamoto, Takeo Fukuchi
OBJECTIVES: To evaluate the vascular architecture of the radial peripapillary capillaries (RPCs) and its relation with visual function in patients with open-angle glaucoma (OAG) and normal-tension glaucoma using spectral-domain optical coherence tomography (SD-OCT) angiography. SUBJECTS AND METHODS: Clear OCT angiography images of blood vessels in the optic disc and peripapillary retina were obtained from 52 patients (52 eyes) aged 55.42±10.64 (range 28-72) years with primary OAG...
2017: PloS One
https://www.readbyqxmd.com/read/28912278/pituitary-macroadenoma-and-visual-impairment-postoperative-outcome-prediction-with-contrast-enhanced-fiesta
#7
S Hisanaga, S Kakeda, J Yamamoto, K Watanabe, J Moriya, T Nagata, Y Fujino, H Kondo, S Nishizawa, Y Korogi
BACKGROUND AND PURPOSE: Contrast-enhanced FIESTA can depict anterior optic pathways in patients with large suprasellar tumors. We assessed whether the degree of kink in the optic nerve at the optic canal orifice on contrast-enhanced FIESTA correlates with the postoperative improvement of visual impairment in patients with pituitary macroadenoma. MATERIALS AND METHODS: Thirty-one patients with pituitary macroadenoma who underwent preoperative MR imaging and an operation were evaluated...
September 14, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28905889/real-space-imaging-of-non-collinear-antiferromagnetic-order-with-a-single-spin-magnetometer
#8
I Gross, W Akhtar, V Garcia, L J Martínez, S Chouaieb, K Garcia, C Carrétéro, A Barthélémy, P Appel, P Maletinsky, J-V Kim, J Y Chauleau, N Jaouen, M Viret, M Bibes, S Fusil, V Jacques
Although ferromagnets have many applications, their large magnetization and the resulting energy cost for switching magnetic moments bring into question their suitability for reliable low-power spintronic devices. Non-collinear antiferromagnetic systems do not suffer from this problem, and often have extra functionalities: non-collinear spin order may break space-inversion symmetry and thus allow electric-field control of magnetism, or may produce emergent spin-orbit effects that enable efficient spin-charge interconversion...
September 13, 2017: Nature
https://www.readbyqxmd.com/read/28900577/comparison-of-threshold-saccadic-vector-optokinetic-perimetry-svop-and-standard-automated-perimetry-sap-in-glaucoma-part-ii-patterns-of-visual-field-loss-and-acceptability
#9
Alice D McTrusty, Lorraine A Cameron, Antonios Perperidis, Harry M Brash, Andrew J Tatham, Pankaj K Agarwal, Ian C Murray, Brian W Fleck, Robert A Minns
PURPOSE: We compared patterns of visual field loss detected by standard automated perimetry (SAP) to saccadic vector optokinetic perimetry (SVOP) and examined patient perceptions of each test. METHODS: A cross-sectional study was done of 58 healthy subjects and 103 with glaucoma who were tested using SAP and two versions of SVOP (v1 and v2). Visual fields from both devices were categorized by masked graders as: 0, normal; 1, paracentral defect; 2, nasal step; 3, arcuate defect; 4, altitudinal; 5, biarcuate; and 6, end-stage field loss...
September 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28873756/phytosterols-induced-viscoelasticity-of-oleogels-prepared-by-using-monoglycerides
#10
Mohd Dona Bin Sintang, Sabine Danthine, Allison Brown, Davy Van de Walle, Ashok R Patel, Iris Tavernier, Tom Rimaux, Koen Dewettinck
Monoglycerides (MGs) and phytosterols (PS) are known to form firm oleogels with liquid oil. However, the oleogels are prone to undergo polymorphic transition over time that lead to crystals' aggregation thus, compromises physical properties. Thus, we combined MGs with PS to control the crystallization and modify the morphology of the combination oleogels, as both components are reported to interact together. The oleogels were prepared at different ratio combinations and characterized in their rheological, thermal, morphology, and diffraction properties...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28868033/sturge-weber-syndrome-associated-with-monolateral-ocular-melanocytosis-iris-mammillations-and-diffuse-choroidal-haemangioma
#11
Andrea Maria Plateroti, Rocco Plateroti, Roberto Mollo, Aloisa Librando, Maria Teresa Contestabile, Vito Fenicia
We present the case of a 12-year-old boy with Sturge-Weber syndrome and ocular melanocytosis who presented with bilateral naevus flammeus of the face and hyperpigmentation of the right iris associated with ipsilateral iris mammillations. The patient had glaucoma and a diffuse choroidal haemangioma of the right eye. Optical coherence tomography of the anterior segment confirmed iris hyper-pigmentation and did not show abnormalities of the chamber angle structures. B-scan ultrasonography and enhanced depth imaging optical coherence tomography were performed and showed a marked difference in thickness and reflectance between the right and left choroid...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28863215/multifocal-visual-evoked-potential-in-eyes-with-temporal-hemianopia-from-chiasmal-compression-correlation-with-standard-automated-perimetry-and-oct-findings
#12
Rafael M Sousa, Maria K Oyamada, Leonardo P Cunha, Mário L R Monteiro
Purpose: To verify whether multifocal visual evoked potential (mfVEP) can differentiate eyes with temporal hemianopia due to chiasmal compression from healthy controls. To assess the relationship between mfVEP, standard automated perimetry (SAP), and Fourier domain-optical coherence tomography (FD-OCT) macular and peripapillary retinal nerve fiber layer (RNFL) thickness measurements. Methods: Twenty-seven eyes with permanent temporal visual field (VF) defects from chiasmal compression on SAP and 43 eyes of healthy controls were submitted to mfVEP and FD-OCT scanning...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28861036/contralesional-trunk-rotation-dissociates-real-vs-pseudo-visual-field-defects-due-to-visual-neglect-in-stroke-patients
#13
Thomas Nyffeler, Rebecca E Paladini, Simone Hopfner, Oliver Job, Tobias Nef, Tobias Pflugshaupt, Tim Vanbellingen, Stephan Bohlhalter, René M Müri, Georg Kerkhoff, Dario Cazzoli
In stroke patients, the clinical presentation of visual field defects (VFDs) is frequently accompanied by visual neglect, i.e., the inability to attend and respond to the contralesional space. However, the diagnostic discrimination between the lack of reactions to contralesional stimuli due to VFDs or visual neglect is challenging during clinical examination. This discrimination is particularly relevant, since both clinical pictures are associated with different therapeutic approaches and outcomes. The aim of this study was to systematically investigate the effectiveness of trunk rotation toward the contralesional side-a manipulation dissociating the coordinate system of the trunk from that of the head and eyes-in disentangling real VFDs from "pseudo-VFDs" that occur due to visual neglect...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28861031/visual-dysfunction-in-posterior-cortical-atrophy
#14
REVIEW
Mari N Maia da Silva, Rebecca S Millington, Holly Bridge, Merle James-Galton, Gordon T Plant
Posterior cortical atrophy (PCA) is a syndromic diagnosis. It is characterized by progressive impairment of higher (cortical) visual function with imaging evidence of degeneration affecting the occipital, parietal, and posterior temporal lobes bilaterally. Most cases will prove to have Alzheimer pathology. The aim of this review is to summarize the development of the concept of this disorder since it was first introduced. A critical discussion of the evolving diagnostic criteria is presented and the differential diagnosis with regard to the underlying pathology is reviewed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28857944/volumetric-measurement-of-optic-nerve-head-drusen-using-swept-source-optical-coherence-tomography
#15
Edem Tsikata, Alice C Vercellin Verticchio, Iryna Falkenstein, Linda Yi-Chieh Poon, Stacey Brauner, Ziad Khoueir, John B Miller, Teresa C Chen
PURPOSE: To describe new software tools for quantifying optic nerve head drusen volume using 3-dimensional (3D) swept-source optical coherence tomography (SS-OCT) volumetric scans. MATERIALS AND METHODS: SS-OCT was used to acquire raster volume scans of 8 eyes of 4 patients with bilateral optic nerve head drusen. The scans were manually segmented by 3 graders to identify the drusen borders, and thereafter total drusen volumes were calculated. Linear regression was performed to study the relationships between drusen volume, retinal nerve fiber layer thickness, and Humphrey visual field mean deviation...
September 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28844780/5-aminolevulinic-acid-fluorescence-guided-resection-of-malignant-glioma-hong-kong-experience
#16
Danny Tat Ming Chan, Hsieh Yi-Pin Sonia, Wai Sang Poon
BACKGROUND: 5-Aminolevulinic Acid (5-ALA) induced fluorescence is useful in guiding glioma resection. The extent of 5-ALA accumulation is beyond gadolinium contrast enhancement.(1,2) Supratotal resection may be achieved, potentially granting patients with better survival. We present our experience on 5-ALA guided glioma resection in Chinese ethnics. METHOD: Sixteen Patients ingested 5-ALA (Gliolan, Medas Germany) 20 mg/kg·m(2) 4 h before surgery. The tumor resection was guided by fluorescence with neurosurgical microscope...
August 24, 2017: Asian Journal of Surgery
https://www.readbyqxmd.com/read/28837978/-do-we-perform-glaucoma-surgery-too-late
#17
Jörg Peter Egon Stürmer, Christoph Faschinger
As glaucoma specialists, we often ask ourselves why patients are referred so late for surgery. Usually the patient is referred in a far advanced stage of the disease after long-term conventional treatment with topical medications. By that time, substantial morphologic damage is present and the patient is disabled by far advanced visual field defects. In addition, decompensated intraocular pressure, despite maximal tolerated medical treatment, is seen. Delayed surgery due to late diagnosis is rather a rare event...
August 24, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28826711/surgical-management-of-rathke-s-cleft-cysts
#18
Vishwaraj Ratha, Subodh Patil, Vikram S Karmarkar, Nishit J Shah, Chandrashekhar E Deopujari
BACKGROUND: The diagnosis of Rathke's Cleft cysts (RCC) have increased in recent times due to improvements in imaging techniques; however symptomatic cases are uncommon and accurate preoperative diagnosis may sometimes be difficult. The indications of surgical management protocol are evolving. We aim to provide a comprehensive review of clinical, imaging, and histopathological features with operative management strategies along with outcome and prognosis in RCC. METHODS: A retrospective analysis (2003-2015)of 58 consecutive cases of RCC seen in a surgical unit...
August 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28820764/severe-case-of-renal-coloboma-syndrome-in-long-term-follow-up
#19
Lise Sels, Werner Dirven, Koenraad Devriendt, Anita Leys
PURPOSE: To characterize the ocular features of a severe case of renal coloboma syndrome in a long-term follow-up. METHODS: Observational case report over a period of 45 years. Examination under anesthesia at the age of 3 months, repeated ophthalmologic examination (age 7, 14, 25, 45 years), fluorescein and indocyanine green angiography, electroretinography, ocular ultrasound, optical coherence tomography, computed tomography scan orbits, and magnetic resonance imaging of the brain...
August 17, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28818310/fracture-analysis-of-tube-boiler-for-physical-explosion-accident
#20
Eui Soo Kim
Material and failure analysis techniques are key tools for determining causation in case of explosive and bursting accident result from material and process defect of product in the field of forensic science. The boiler rupture generated by defect of the welding division, corrosion, overheating and degradation of the material have devastating power. If weak division of boiler burner is fractured by internal pressure, saturated vapor and water is vaporized suddenly. At that time, volume of the saturated vapor and water increases up to thousands of volume...
September 2017: Forensic Science International
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