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optic coherent tomography

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https://www.readbyqxmd.com/read/29453727/floating-flap-of-internal-limiting-membrane-in-myopic-macular-hole-surgery
#1
Kenji Yamashiro, Eri Kinoshita-Nakano, Toru Ota, Yoko Jingami, Isao Nakata, Hisako Hayashi
PURPOSE: To evaluate the surgical results of macular hole (MH) in patients with high myopia treated with pars plana vitrectomy (PPV) leaving the internal limiting membrane (ILM) flap floating in vitreous fluid at the edge of the MH. METHODS: Nine highly myopic eyes with MH of nine consecutive patients who underwent PPV were retrospectively evaluated. Three eyes were accompanied by retinal detachment (RD). ILM peeling was performed around the MH and some part of the ILM flap was left attached to the edge of the MH...
February 16, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29453673/optical-coherence-tomography-angiography-discerns-preclinical-diabetic-retinopathy-in-eyes-of-patients-with-type-2-diabetes-without-clinical-diabetic-retinopathy
#2
Dan Cao, Dawei Yang, Zhongning Huang, Yunkao Zeng, Jun Wang, Yunyan Hu, Liang Zhang
AIMS: To investigate changes in retinal vascular plexuses and choriocapillaris in patients with type 2 diabetes mellitus (DM2) without diabetic retinopathy (DR) and healthy controls using optical coherence tomography angiography (OCTA). METHODS: A total of 71 DM2 and 67 healthy control subjects were included. All subjects underwent OCTA examination (RTVue-XR Avanti; Optovue, Fremont, CA, USA). Average vessel density in superficial capillary plexus (SCP), deep capillary plexus (DCP) and choriocapillaris, parafoveal vessel density in SCP and DCP, FAZ area (mm 2 ) in SCP, microaneurysms and capillary nonperfusion were taken into analysis...
February 16, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29452450/-cost-comparison-of-licensed-intravitreal-therapies-for-insufficiently-anti-vegf-responding-fovea-involving-diabetic-macular-edema-in-germany
#3
Aljoscha S Neubauer, Christos Haritoglou, Michael W Ulbig
BACKGROUND: In the treatment of center-involving diabetic macular edema, despite initial therapy with an anti-VEGF compound, an insufficient response may occur. Further therapy options include a switch of anti-VEGF products or to corticosteroid implants, such as Fluocinolone acetonide or Dexamethasone. OBJECTIVES: Firstly, to investigate systematically which evidence-based study data are available describing the efficacy of in-label treatments after primary anti-VEGF treatment, secondly, to investigate which costs go along for the healthcare provider...
February 16, 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29451998/predicting-the-integrated-visual-field-with-wide-scan-optical-coherence-tomography-in-glaucoma-patients
#4
Masaaki Yoshida, Shiho Kunimatsu-Sanuki, Kazuko Omodaka, Toru Nakazawa
PURPOSE: This study aimed to calculate a predicted integrated visual field (IVF) based on predicted monocular visual fields (MVFs) derived, with a new method, from wide-scan optical coherence tomography (OCT) data. MATERIALS AND METHODS: Visual field testing used the central (6 × 4) 24 points of the Humphrey Field Analyzer 24-2 program. OCT scans of a corresponding retinal area, centered on the fovea, were divided into a 6 × 4 grid. The thickness of the macular retinal nerve fiber layer (mRNFL), ganglion cell layer + inner plexiform layer (GCIPL), and mRNFL + GCIPL (GCC) was measured in each grid area...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451996/foveal-avascular-zone-area-changes-analyzed-using-oct-angiography-after-successful-rhegmatogenous-retinal-detachment-repair
#5
Je Moon Woo, Yo Sep Yoon, Jong Eun Woo, Jung Kee Min
PURPOSE: To investigate foveal avascular zone (FAZ) area after surgery in patients with rhegmatogenous retinal detachment (RRD) that involved or uninvolved the macula, and to evaluate the correlation between FAZ area and visual outcomes using swept-source optical coherence tomography angiography (OCTA). MATERIALS AND METHODS: This retrospective case-control study included 34 eyes (34 patients) with recent onset RRD that were successfully repaired with a single, uncomplicated surgical procedure (pars plana vitrectomy with gas tamponade)...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451995/sex-dependent-choroidal-thickness-differences-in-healthy-adults-a-study-based-on-original-and-synthesized-data
#6
Wei Wang, Miao He, Xingwu Zhong
PURPOSE: The purpose of this study is to determine the influence of sex on choroidal thickness (CT) in healthy adults. METHODS: Healthy Chinese adults were recruited and complete ophthalmic examinations were performed. The choroid was imaged by swept-source optical coherence tomography and the macular CT in Early Treatment Diabetic Retinopathy Study grids was obtained by the intrinsic automated segmentation software. CT in males and females was compared after controlling other factors...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451992/optical-coherence-tomography-angiography-of-the-peripapillary-retina-in-normal-tension-glaucoma-and-chronic-nonarteritic-anterior-ischemic-optic-neuropathy
#7
Rodolfo Mastropasqua, Luca Agnifili, Enrico Borrelli, Vincenzo Fasanella, Lorenza Brescia, Luca Di Antonio, Leonardo Mastropasqua
PURPOSE: To analyze the retinal radial peripapillary capillary (RPC) network in normal-tension glaucoma (NTG) and nonarteritic anterior ischemic optic neuropathy (NAION) eyes using optical coherence tomography angiography (OCTA). MATERIAL AND METHODS: Twenty-two patients with NTG, 22 patients with unilateral chronic NAION, and 23 age-matched controls were enrolled. Patients underwent OCTA to obtain en face angiograms of the peripapillary region. The main outcome measures were as follows: (1) the whole en face image perfusion density (WPD) and (2) the circumpapillary perfusion density (CPD)...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29450624/-intraoperative-optical-coherence-tomography-in-explorative-vitrectomy-in-patients-with-vitreous-haemorrhage-a-case-series
#8
D Heinrich, S Bohnacker, M A Nasseri, N Feucht, C P Lohmann, M Maier
BACKGROUND: High-resolution spectral domain optical coherence tomography (SD-OCT) is a gold standard technique for diagnosis, management and monitoring of patients with vitreoretinal diseases. Preoperative diagnostics for evaluation of intraocular and retinal status in patients with vitreous haemorrhage are limited, thus final therapeutic decisions can only be made during explorative vitrectomy. We evaluated the use of intraoperative SD-OCT (iSD-OCT) as a real-time additional diagnostic tool during explorative vitrectomy in patients with vitreous haemorrhage...
February 15, 2018: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29450622/comparison-of-retinal-microvascular-changes-in-eyes-with-high-tension-glaucoma-or-normal-tension-glaucoma-a-quantitative-optic-coherence-tomography-angiographic-study
#9
Huan Xu, Ruyi Zhai, Yuan Zong, Xiangmei Kong, Chunhui Jiang, Xinghuai Sun, Yi He, Xiqi Li
PURPOSE: The aim of this study is to determine and compare the changes in the retinal vasculature in eyes with high-tension glaucoma (HTG) or normal-tension glaucoma (NTG). METHODS: The right eyes of 43 HTG subjects, 33 NTG subjects, and 51 age- and sex-matched normal subjects were included in this cross-sectional study. Signals were projected from the internal limiting membrane to retinal pigment epithelium. The retinal perfused vessel densities in the peripapillary and parafoveal regions were measured automatically with optic coherence tomography angiography and the split-spectrum amplitude-decorrelation angiography algorithm...
February 15, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29450547/aflibercept-action-in-a-rabbit-model-of-chronic-retinal-neovascularization-reversible-inhibition-of-pathologic-leakage-with-dose-dependent-duration
#10
Jingtai Cao, Thomas C MacPherson, Bibiana V Iglesias, Yang Liu, Natasha Tirko, George D Yancopoulos, Stanley J Wiegand, Carmelo Romano
Purpose: We establish and characterize the chronic retinal neovascularization (RNV) induced by intravitreal (IVT) injection of DL-α-aminoadipic acid (AAA) in a rabbit model and investigate the extent and duration of inhibitory actions induced by IVT aflibercept on the RNV. Methods: Rabbits received a single IVT injection of AAA, with weekly follow-up fundus photography, fluorescein angiography (FA), and optical coherence tomography (OCT). After 10 weeks, they received a single IVT aflibercept or control injection...
February 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29450473/elevated-blood-viscosity-and-micro-recirculation-linked-to-coronary-stent-malapposition
#11
Eric Poon, Vikas Thondapu, Umair Hayat, Peter Barlis, Chooi Yap, Po Kuo, Qisen Wang, Jiawei Ma, Shuang Zhu, Stephen Moore, Andrew Ooi
One particular complexity of coronary artery is the natural tapering of the vessel with proximal segments having larger caliber and distal tapering as the vessel get smaller. The natural tapering of a coronary artery often leads to proximal incomplete stent apposition (ISA). ISA alters coronary hemodynamics and creates pathological path to develop complications such as in-stent restenosis, and more worryingly, stent thrombosis. By employing state-of-the-art computer-aided design software, generic stent hoops were virtually deployed in an idealized tapered coronary artery with decreasing malapposition distance...
February 14, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29450380/can-optical-coherence-tomography-redefine-amblyopia
#12
REVIEW
Elena Avram
Introduction: For many years, amblyopia was regarded as a disorder of the visual system in which an organic cause could not be identified. Optical Coherence Tomography opens new horizons in understanding the etiopathology of amblyopia and seems to highlight morphologic anomalies in the retina of the amblyopic eye. Purpose: The objective of this paper is to analyze the macular thickness, optic nerve changes, and choroidal thickness found in patients diagnosed with amblyopia based on trials reported in the literature...
April 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29449964/consequences-of-inadvertent-intravitreal-mitomycin-c-injection
#13
Ahmad Mirshahi, Alireza Lashay, Mohammad Reza Mehrabi Bahar, Mojtaba Abrishami
Background: Mitomycin C (MMC) as an alkylating agent is miscellaneous an antineoplastic, antibiotic and ophthalmic agent. Here we aim to report a case of inadvertent intravitreal MMC injection instead of Avastin in case of diabetic macular edema. Case presentation: A 53 years old woman was planned to receive intravitreal Avastin injection, but accidentally, 0.05 ml of MMC 0.2% was injected. Best corrected visual acuity (BCVA) was 20/160 before injection. After 2 days, patient was referred to a tertiary referral eye center...
2018: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/29448042/quantitative-comparisons-between-optical-coherence-tomography-angiography-and-matched-histology-in-the-human-eye
#14
Dong An, Chandrakumar Balaratnasingam, Morgan Heisler, Ashley Francke, MyeongJin Ju, Ian L McAllister, Marinko Sarunic, Dao-Yi Yu
The aim was to quantitatively compare retinal vascular detail as seen on optical coherence tomography angiography (OCTA) and matched histology in the human eye. 13 normal human donor eyes were used. The central retinal artery was cannulated after which human packed red blood cells were perfused through the retinal vasculature. Retinal vessels were imaged using a custom-built OCTA device during red blood cell perfusion. The eye was subsequently perfused with endothelial cell antibodies and the flat-mounted retina studied histologically using a confocal scanning laser microscope...
February 12, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29447481/regularity-changes-of-the-retinal-nerve-fiber-layer-and-macular-ganglion-cell-complex-in-patients-with-the-amnestic-mild-cognitive-impairment
#15
Yue Wu, Xiao-Ni Wang, Ningli Wang, Ying Han, Daqing Ma, Yan Lu
Background We investigated the regularity changes of the retinalnerve fiber layer (RNFL) and macular ganglion cell complex (mGCC) of the amnestic Mild Cognitive Impairment (aMCI) patients in this prospective cohort study. Methods Twenty-four aMCI patients and 30 health controls, who are more than 60 years old, were recruited into the study. The RNFL and the mGCC average thickness were measured with fourier-domain optical coherence tomography (FD-OCT). Results Compared with that in the controls, the intraocular pressure (IOP) was significantly lower in the aMCI patients...
February 15, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29445945/spectral-domain-optical-coherence-tomography-and-fundus-autofluorescence-findings-in-cytomegalovirus-retinitis-in-hiv-infected-patients
#16
Shigeko Yashiro, Takeshi Nishijima, Yuuka Yamamoto, Yumi Sekine, Natsuyo Yoshida-Hata, Tomohiro Iida, Shinichi Oka
PURPOSE: To assess the usefulness of spectral domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) findings in cytomegalovirus (CMV) retinitis. STUDY DESIGN: Observational case series. METHODS: Thirteen eyes of 11 human immunodeficiency virus (HIV)-positive patients with CMV retinitis underwent full ophthalmologic examinations, SD-OCT, and 4 eyes of 4 patients underwent FAF. FAF images included short-wavelength autofluorescence (SW-AF) and near-infrared autofluorescence (IR-AF)...
February 14, 2018: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29445713/effects-of-laser-physical-parameters-on-lesion-size-in-retinal-photocoagulation-surgery-clinical-oct-and-experimental-study
#17
A Soleimani, S H Rasta, T Banaei, A Asgharsharghi Bonab
Introduction: The aim of the present study was to determine burn intensity in retinal laser photocoagulation based on laser parameters; wavelength, power, beam size and pulse duration, using Optical Coherence Tomography (OCT), fundus camera, physical eye model and computer simulation in a clinical study. Materials and Methods: Participants were 10 adult patients between 50-80 years with proliferative diabetic retinopathy. A multicolor-photo coagulator with 532 nm green and 672 nm red for retina photocoagulation in diabetic retinopathy was used to investigate the participants...
December 2017: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29445522/early-changes-in-macular-optical-coherence-tomography-parameters-after-ranibizumab-intravitreal-injection-in-patients-with-exsudative-age-related-macular-degeneration
#18
Nicole Antunes de Almeida, Osias Francisco de Souza
Background: Evaluation of the impact of different macular optical coherence parameters on visual acuity as early as 1 day after injection of ranibizumab in patients with subfoveal exsudative age-related macular degeneration. Methods: This was an interventional, non randomized, open label prospective study, where we evaluated 20 eyes of 20 patients affected by exudative age-related macular degeneration. These patients were treated with injections of ranibizumab between February 2013 and January 2015...
2018: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/29445101/projective-measurement-onto-arbitrary-superposition-of-weak-coherent-state-bases
#19
Shuro Izumi, Masahiro Takeoka, Kentaro Wakui, Mikio Fujiwara, Kazuhiro Ema, Masahide Sasaki
One of the peculiar features in quantum mechanics is that a superposition of macroscopically distinct states can exist. In optical system, this is highlighted by a superposition of coherent states (SCS), i.e. a superposition of classical states. Recently this highly nontrivial quantum state and its variant have been demonstrated experimentally. Here we demonstrate the superposition of coherent states in quantum measurement which is also a key concept in quantum mechanics. More precisely, we propose and implement a projection measurement onto an arbitrary superposition of two weak coherent states in optical system...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444552/optometry-facilitated-teleophthalmology-an-audit-of-the-first-year-in-western-australia
#20
Stephen E Bartnik, Stephen P Copeland, Angela J Aicken, Angus W Turner
BACKGROUND: Lions Outback Vision has run a state-wide teleophthalmology service since 2011. In September 2015 the Australian federal government introduced a Medicare reimbursement for optometry-facilitated teleophthalmology consultations under specific circumstances. This audit demonstrates the first 12 months experience with this scheme. We aim to provide practical insights for others looking to embed a telemedicine program as part of delivering outreach clinical services. METHODS: A 12-month retrospective audit was performed between September 2015 and August 2016, inclusive...
February 14, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
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