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https://www.readbyqxmd.com/read/28922031/optic-nerve-head-characteristics-in-chronic-angle-closure-glaucoma-detected-by-swept-source-oct
#1
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/28915835/macular-retinal-and-choroidal-thickness-in-unilateral-amblyopia-using-swept-source-optical-coherence-tomography
#2
Syunsuke Araki, Atsushi Miki, Katsutoshi Goto, Tsutomu Yamashita, Go Takizawa, Kazuko Haruishi, Yoshiaki Ieki, Junichi Kiryu, Kiyoshi Yaoeda
BACKGROUND: To investigate macular retinal and choroidal thickness in amblyopic eyes compared to that in fellow and normal eyes using swept-source optical coherence tomography (SS-OCT). METHODS: This study examined 31 patients with hyperopic anisometropic amblyopia (6.9 ± 3.8 years, mean ± standard deviation), 15 patients with strabismic amblyopia without anisometropia (7.9 ± 4.2 years), and 24 age-matched controls (7.8 ± 3.3 years). Retinal and choroidal thickness was measured by 3D scans using SS-OCT...
September 15, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28890078/choroidal-thinning-associated-with-hydroxychloroquine-retinopathy
#3
Seong Joon Ahn, So Jung Ryu, Joo Young Joung, Byung Ro Lee
PURPOSE: To investigate choroidal thickness in patients using hydroxychloroquine (HCQ) and compare choroidal thickness between eyes with and without HCQ retinopathy. DESIGN: Retrospective case series METHODS: Setting: Institutional Patients: We included 124 patients with systemic lupus erythematosus or rheumatoid arthritis who were treated with HCQ. The patients were divided into an HCQ retinopathy group and a control group, according to the presence or absence of HCQ retinopathy...
September 7, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28861349/the-change-of-anterior-segment-parameters-after-cataract-surgery-in-normal-tension-glaucoma
#4
Wonseok Lee, Hyoung Won Bae, Chan Yun Kim, Gong Je Seong
AIM: To investigate the change of anterior chamber angle morphology and intraocular pressure (IOP) reduction after cataract surgery in patients with normal-tension glaucoma (NTG) using swept-source optical coherence tomography (SS-OCT). METHODS: This prospective, comparative, observational study recruited patients into two groups. Group 1 was the control group including normal subjects except those with cataracts (cataract group, n=67 eyes of 67 patients), and group 2 was NTG group including patients who were diagnosed with NTG and cataracts (n=43 eyes of 43 patients), which were treated with phacoemulsification and intraocular lens implantation...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28857944/volumetric-measurement-of-optic-nerve-head-drusen-using-swept-source-optical-coherence-tomography
#5
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/28857943/visibility-of-optic-nerve-head-structures-with-spectral-domain-and-swept-source-optical-coherence-tomography
#6
Mónica M Loureiro, Jayme R Vianna, Vishva M Danthurebandara, Glen P Sharpe, Donna M Hutchison, Marcelo T Nicolela, Balwantray C Chauhan
PURPOSE: To compare the visibility of deep optic nerve head (ONH) structures and the visible area of the anterior surface of the lamina cribrosa (ASLC) with spectral-domain optical coherence tomography (SD-OCT) and swept-source OCT (SS-OCT). MATERIALS AND METHODS: In total, 33 glaucoma patients were imaged with SD-OCT (Spectralis, 24 radial B-scans centered on the ONH) and SS-OCT (Atlantis, 12 radial and a horizontal and vertical raster scan pattern containing 5 lines each, centered on the ONH)...
September 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28834826/valsalva-maneuver-induced-changes-in-anterior-lamina-cribrosa-surface-depth-a-comparison-between-normal-and-glaucomatous-eyes
#7
Young Kook Kim, Ahnul Ha, Yong Ju Song, Kyeong Ik Na, Won June Lee, Jin Wook Jeoung, Ki Ho Park
PURPOSE: To investigate the influence of the Valsalva maneuver (VM) on anterior lamina cribrosa surface depth (ALCSD), and to compare normal with treated glaucomatous eyes in terms of this effect. METHODS: Thirty-two patients (32 eyes) with early-to-moderate glaucoma under treatment and 30 normal healthy participants (30 eyes) were prospectively enrolled. Study subjects performed the VM by blowing through a mouthpiece attached to a handheld manometer; expiratory pressure during the maneuver ranged from 35 to 40 mmHg...
August 22, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28819712/optical-coherence-tomography-to-differentiate-papilledema-from-pseudopapilledema
#8
REVIEW
Gema Rebolleda, Aki Kawasaki, Victoria de Juan, Noelia Oblanca, Francisco Jose Muñoz-Negrete
PURPOSE OF REVIEW: Mild papilledema may be difficult to distinguish by clinical observation from pseudopapilledema. An accurate diagnosis is critical to avoid invasive workup and unwarranted treatment. In this review, we focus on the development and subsequent role of optical coherence tomography (OCT) in detecting and differentiating optic nerve head drusen (ONHD) from papilledema and other causes of acquired swelling of the optic disc. RECENT FINDINGS: Newer OCT technologies which permit deeper penetration to improve detection of ONHD were also reviewed...
August 17, 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28794900/structure-versus-function-correlation-between-outer-retinal-and-choroidal-thicknesses-measured-by-swept-source-oct-with-multifocal-electroretinography-and-visual-acuity
#9
Ignacio Flores-Moreno, Luis Arias-Barquet, Marcos J Rubio-Caso, Alex Muñoz-Blanco, María Vidal-Martí, Jaume Catala-Mora, José M Ruiz-Moreno, Jay S Duker, Josep M Caminal
BACKGROUND: To correlate retina-choroidal anatomy as assessed via swept-source OCT (SS-OCT) with retinal function as determined by best-corrected visual acuity (BCVA) and multifocal electroretinogram (mfERG). METHODS: Thirty-three eyes from 33 patients including 16 with neovascular AMD (nvAMD) and 17 controls were included. Patients were included in the present study after a complete ophthalmologic examination, including BCVA, slit-lamp study, intraocular pressure measurement, dilated fundus examination after tropicamide instillation, SD-OCT, SS-OCT, fundus photographs and mfERG...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28765669/application-to-skin-physiology-using-optical-coherence-tomography
#10
Masato Ohmi
Background and aims: The sweat glands and peripheral vessels beneath the skin surface act as minute organs governed by the skin sympathetic nerves and have important physiological functions for body temperature control and nutrition support along with maintenance of a peripheral organization. Dynamics of the mental sweating of sweat glands and the peripheral vessels reflect the activity of a sympathetic nerve. The purpose of this paper is to study the dynamic observation and analysis of sweat glands and a peripheral vessels by optical coherence tomography (OCT)...
December 30, 2016: Laser Therapy
https://www.readbyqxmd.com/read/28732605/prediction-of-postoperative-intraocular-lens-tilt-using-swept-source-optical-coherence-tomography
#11
Nino Hirnschall, Tobias Buehren, Ferid Bajramovic, Michael Trost, Tanja Teuber, Oliver Findl
PURPOSE: To compare crystalline lens tilt in eyes before and intraocular lens (IOL) tilt in eyes after cataract surgery using swept-source optical coherence tomography (SS-OCT) (IOLMaster 700). SETTING: Hanusch Hospital, Vienna, Austria. DESIGN: Prospective case series. METHODS: Patients' eyes were scanned 1 week before and 2 months after cataract surgery with IOL implantation using an SS-OCT device. This device performs B-scans along 6 meridians (0, 30, 60, 90, 120, and 150 degrees) to determine lens and IOL tilt...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28717565/twenty-five-years-of-optical-coherence-tomography-the-paradigm-shift-in-sensitivity-and-speed-provided-by-fourier-domain-oct-invited
#12
Johannes F de Boer, Rainer Leitgeb, Maciej Wojtkowski
Optical coherence tomography (OCT) has become one of the most successful optical technologies implemented in medicine and clinical practice mostly due to the possibility of non-invasive and non-contact imaging by detecting back-scattered light. OCT has gone through a tremendous development over the past 25 years. From its initial inception in 1991 [Science254, 1178 (1991)] it has become an indispensable medical imaging technology in ophthalmology. Also in fields like cardiology and gastro-enterology the technology is envisioned to become a standard of care...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28700251/choroidal-and-retinal-anatomical-responses-following-systemic-corticosteroid-therapy-in-vogt-koyanagi-harada-disease-using-swept-source-optical-coherence-tomography
#13
Durgasri Jaisankar, Rajiv Raman, Hitesh R Sharma, Neha Khandelwal, Muna Bhende, Rupesh Agrawal, Sridharan Sudharshan, Jyotirmay Biswas
PURPOSE: To assess structural changes in retina and choroid after systemic corticosteroid therapy in Vogt-Koyanagi-Harada (VKH) disease using swept-source optical coherence tomography (SS-OCT). METHODS: SS-OCT was conducted before treatment and during first-month follow-up in 16 eyes treated with systemic corticosteroids for active VKH. Retina was divided into five zones depending on pretreatment choroidal thickness (CT) of <100, >100 to <200, >200 to <300, >300 to <400 and >400μm, and changes in retinal thickness and CT after treatment in these zones were compared with baseline...
July 12, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28663845/reduction-of-frame-rate-in-full-field-swept-source-optical-coherence-tomography-by-numerical-motion-correction-invited
#14
Clara Pfäffle, Hendrik Spahr, Dierck Hillmann, Helge Sudkamp, Gesa Franke, Peter Koch, Gereon Hüttmann
Full-field swept-source optical coherence tomography (FF-SS-OCT) was recently shown to allow new and exciting applications for imaging the human eye that were previously not possible using current scanning OCT systems. However, especially when using cameras that do not acquire data with hundreds of kHz frame rate, uncorrected phase errors due to axial motion of the eye lead to a drastic loss in image quality of the reconstructed volumes. Here we first give a short overview of recent advances in techniques and applications of parallelized OCT and finally present an iterative and statistical algorithm that estimates and corrects motion-induced phase errors in the FF-SS-OCT data...
March 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28643709/comparison-of-central-corneal-thickness-with-four-noncontact-devices-an-agreement-analysis-of-swept-source-technology
#15
Erhan Ozyol, Pelin Özyol
PURPOSE: The purpose of this study was to compare the central corneal thickness (CCT) measurements of four noncontact devices in healthy eyes. MATERIALS AND METHODS: In a sample of 45 healthy controls, CCT was measured using an optical biometer (IOLMaster 700) based on swept-source optical coherence tomography (SS-OCT), high-resolution rotating Scheimpflug camera system (Pentacam HR), spectral-domain OCT (SD-OCT) device with an anterior segment module (Spectralis), and noncontact pachymetry (NCP) device (Topcon TRK-2P)...
June 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28637033/quantitative-swept-source-optical-coherence-tomography-of-early-enamel-erosion-in-vivo
#16
Rupert S Austin, Maisalamah Haji Taha, Frederic Festy, Richard Cook, Manoharan Andiappan, Juliana Gomez, Iain A Pretty, Rebecca Moazzez
Swept-source optical coherence tomography (SS-OCT) shows potential for the in vivo quantitative evaluation of micro-structural enamel surface phenomena occurring during early erosive demineralization. This randomized controlled single-blind cross-over clinical study aimed to evaluate the use of SS-OCT for detecting optical changes in the enamel of 30 healthy volunteers subjected to orange juice rinsing (erosive challenge) in comparison to mineral water rinsing (control), according to wiped and non-wiped enamel surface states...
June 22, 2017: Caries Research
https://www.readbyqxmd.com/read/28625685/objective-quantification-of-anterior-chamber-inflammation-measuring-cells-and-flare-by-anterior-segment-optical-coherence-tomography
#17
Alessandro Invernizzi, Sylvia Marchi, Raffaella Aldigeri, Valentina Mastrofilippo, Fabiana Viscogliosi, Annamaria Soldani, Chantal Adani, Elena Garoli, Francesco Viola, Luigi Fontana, Peter McCluskey, Luca Cimino
PURPOSE: To assess the ability of swept-source (SS) optical coherence tomography (OCT) of the anterior segment (AS) to measure anterior chamber (AC) inflammation (both flare and cells) objectively. To compare OCT-derived inflammatory indices with standard techniques. DESIGN: Prospective evaluation of a diagnostic test. PARTICIPANTS: Patients diagnosed with anterior uveitis (active or inactive) and controls. METHODS: Participants underwent an AC inflammation evaluation including: clinical cell and flare grading and laser flare photometry (LFP)...
June 16, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28579063/choroidal-changes-associated-with-subretinal-drusenoid-deposits-in-age-related-macular-degeneration-using-swept-source-optical-coherence-tomography
#18
MULTICENTER STUDY
Inês Laíns, Jay Wang, Joana Providência, Steven Mach, Pedro Gil, João Gil, Marco Marques, Grayson Armstrong, Shady Garas, Patrícia Barreto, Ivana K Kim, Demetrios G Vavvas, Joan W Miller, Deeba Husain, Rufino Silva, John B Miller
PURPOSE: To compare choroidal vascular features of eyes with and without subretinal drusenoid deposits (SDD), using swept-source optical coherence tomography (SS OCT). DESIGN: Multicenter, cross-sectional study. METHODS: We prospectively recruited patients with intermediate age-related macular degeneration (AMD), without other vitreoretinal pathology. All participants underwent complete ophthalmic examination, color fundus photography (used for AMD staging), and spectral-domain OCT (to evaluate the presence of SDD)...
August 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28559547/comparison-of-ocular-biometric-measurements-between-a-new-swept-source-optical-coherence-tomography-and-a-common-optical-low-coherence-reflectometry
#19
Rongrong Gao, Hao Chen, Giacomo Savini, Yaxin Miao, Xiaorui Wang, Jing Yang, Weiqi Zhao, Qinmei Wang, Jinhai Huang
The purpose of the current study was to compare the measurements between a new optical biometer based on swept-source optical coherence tomography (SS-OCT), the OA-2000 (Tomey, Japan), and an optical biometer based on optical low coherence reflectometry (OLCR), the Lenstar (Haag-Streit, Switzerland). Ninety-nine eyes of 99 healthy subjects were included. The axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AD), lens thickness (LT), keratometry (K) readings, including flat K (Kf), steep K (Ks), mean K (Km), astigmatism vectors J0, J45 at diameters of 2...
May 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28535994/diabetic-choroidopathy
#20
Gerard A Lutty
Early histopathological studies of diabetic choroids demonstrated loss of choriocapillaris (CC), tortuous blood vessels, microaneurysms, drusenoid deposits on Bruchs membrane, and choroidal neovascularization. The preponderance of histopathological changes were at and beyond equator. Studies from my lab suggest that diabetic choroidopathy is an inflammatory disease in that leukocyte adhesion molecules are elevated in the choroidal vasculature and polymorphonuclear neutrophils are often associated with sites of vascular loss...
May 20, 2017: Vision Research
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