Read by QxMD icon Read

Swept source oct

Hyo Kyung Lee, Mee Kum Kim
BACKGROUND: The purpose of this study is to compare the biometric parameters and intraocular lens (IOL) power calculation by a new swept-source optical coherence tomography (SS-OCT) biometer with those by a partial coherence interferometry (PCI) biometer. METHODS: Medical records of 175 eyes from 175 patients were retrospectively reviewed. One of two monofocal IOLs (Tecnis ZCB00 or Acrysof SA60AT) were implanted in the eyes. Axial length (AL), mean keratometry (Km), J0, J45 and anterior chamber depth (ACD) were compared between PCI and SS-OCT biometers...
October 19, 2018: BMC Ophthalmology
Ireneusz Grulkowski, Silvestre Manzanera, Lukasz Cwiklinski, Juan Mompeán, Alberto de Castro, Jose Maria Marin, Pablo Artal
We demonstrate an optimized optical platform for the three-dimensional (3-D) visualization of crystalline lens opacities in vivo in the eyes of patients with different types and grades of cataracts. We developed a prototype long-depth-range swept source optical coherence tomography (SS-OCT) instrument operating at the speed of 50 kA-scans/second and at the central wavelength of 1 μm to perform high-resolution imaging of the whole anterior segment of the eye. Volumetric data sets of cataractous eyes were acquired and processed to obtain contrast-enhanced high-resolution images of lenticular structures and opacifications...
August 1, 2018: Biomedical Optics Express
Junjie Deng, Xiangui He, Bo Zhang, Shuyu Xiong, Jianfeng Zhu, Ling Wang, Mingjin Wang, Xun Xu
PURPOSE: The purpose of this project is to explore the changes in and factors associated with asymmetry between the superior and inferior hemiretina in children with different refractive levels. MATERIALS AND METHODS: A total of 2,964 children from twelve primary and middle schools in Shanghai, China, were included. The mean thickness of the GCL+ layer (ganglion cell layer+ inner plexiform layer), the GCC layer (ganglion cell complex, a combination of the retinal nerve fiber layer and the GCL+ layer), and the neural retina were measured according to the sectors defined by the Early Treatment of Diabetic Retinopathy Study (ETDRS) grid with swept-source optical coherence tomography...
October 18, 2018: Current Eye Research
Mark A Bullimore, Stephen Slade, Paul Yoo, Todd Otani
OBJECTIVES: To evaluate the repeatability and reproducibility of the Carl Zeiss Meditec IOLMaster 700, which uses swept-source optical coherence tomography technology, along with its agreement with the IOLMaster 500 and Lenstar LS 900. METHODS: In a clinical practice, complete measurements were taken on one eye of 100 subjects: 51 with cataracts and 49 with clear lenses. Three sets of measurements were taken by 3 operators with three different IOLMaster 700 units, and one operator took 3 measurements with the IOLMaster 500 and the Lenstar...
October 15, 2018: Eye & Contact Lens
Pukhraj Rishi, Subramanian Krishnakumar, Jyotirmay Biswas, Sridevi Nair
Purpose: To report bilateral retinoblastoma in an 11-year-old child presenting with floaters and sub-internal limiting membrane (sub-ILM) seeds. Method: An 11-year-old child presented with floaters of 4 months' duration. Examination revealed circumscribed, whitish, subhyaloid, floccular nodules in the juxtapapillary region of both eyes. No solid tumor was seen. Swept-source optical coherence tomography revealed moderately reflective echoes in the sub-ILM space. Vitreous aspiration of sub-ILM deposits and cytopathological examination revealed retinoblastoma...
September 2018: Ocular Oncology and Pathology
Felipe Pereira, Luiz H Lima, Alexandre Gomes B de Azevedo, Claudio Zett, Michel E Farah, Rubens Belfort
BACKGROUND: Swept-source optical coherence tomography (SS-OCT) has a higher scanning rate and longer wavelength in comparison with spectral-domain OCT (SD-OCT), allowing an improved imaging of retinal vascular plexuses and choriocapillaris. The present two patients diagnosed with multiple evanescent white dot syndrome (MEWDS) underwent fundus autofluorescence (FAF), en-face SS-OCT, and SS-OCT angiography (OCTA) imaging, and its features were described and correlated. RESULTS: The clinical and imaging findings of both cases were consistent with the diagnosis of MEWDS...
October 13, 2018: Journal of Ophthalmic Inflammation and Infection
Ding Chen, Zhangliang Li, Jinhai Huang, Liuqing Yu, Songjia Liu, Yun-E Zhao
PURPOSE: To quantitate lens nuclear opacity using long-range swept-source optical coherence tomography (SS-OCT) images and to evaluate the correlation of this method to Lens Opacities Classification System III (LOCS III) and a Scheimpflug imaging-based grading system (Pentacam Nuclear Stage function; PNS). METHODS: This study enrolled 120 participants (120 eyes) with age-related nuclear cataracts. The best-corrected visual acuity (BCVA), LOCS III nuclear opalescence (NO) and nuclear colour (NC) were obtained...
October 12, 2018: British Journal of Ophthalmology
Jun Woo Park, Joo Eun Lee, Kang Yeun Pak
PURPOSE: To evaluate posterior vitreous structures using swept-source (SS) optical coherence tomography (OCT) with en face imaging. METHODS: We retrospectively reviewed OCT images of healthy individuals who did not have intra-ocular disease. We obtained high-definition horizontal and vertical line scans crossing the fovea and 3D scans using SS-OCT, with the 3D scan centered between the fovea and the optic-nerve head. An enhanced vitreous visualization function was used to highlight vitreous structures...
October 2018: Korean Journal of Ophthalmology: KJO
Li Wang, Rodrigo Guimaraes de Souza, Mitchell P Weikert, Douglas D Koch
PURPOSE: To evaluate crystalline lens and intraocular lens (IOL) tilt using a swept-source optical coherence tomography (SS-OCT) biometer (IOLMaster 700). SETTING: Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA. DESIGN: Retrospective case series. METHODS: The study patients were evaluated for 1) repeatability of the crystalline lens tilt measurement, 2) preoperative crystalline lens and postoperative IOL tilt in right eyes, 3) mirror symmetry between right eyes and left eyes, 4) the correlation between preoperative crystalline lens and postoperative IOL tilt, and 5) the correlation between the magnitude of lens tilt and ocular parameters...
October 8, 2018: Journal of Cataract and Refractive Surgery
Efstathios Vounotrypidis, Velina Haralanova, Daniel R Muth, Christian Wertheimer, Mehdi Shajari, Armin Wolf, Siegfried Priglinger, Wolfgang J Mayer
PURPOSE: To evaluate the accuracy of a swept-source optical coherence tomography (SS-OCT) biometer compared with a standard partial coherence interferometry (PCI) biometer in terms of phacovitrectomy for vitreomacular pathology and cataract. SETTING: Department of Ophthalmology, Ludwig-Maximilians-University Munich, Germany. DESIGN: Prospective, nonrandomized, single center consecutive case series. METHODS: Patients with age-related cataract, regular corneal astigmatism less than 1...
October 8, 2018: Journal of Cataract and Refractive Surgery
Qinqin Zhang, Kasra A Rezaei, Steven S Saraf, Zhongdi Chu, Fupeng Wang, Ruikang K Wang
Background: To implement an ultra-wide optical coherence tomography angiography imaging (UW-OCTA) modality in eyes with diabetic retinopathy (DR) with the aim of quantifying the burden of microvascular disease at baseline and subsequent clinic visits. Methods: UW-OCTA was implemented on a 1,060 nm swept source (SS) OCTA engine running at 100 kHz A-line rate with a motion tracking mechanism. A montage scanning protocol was used to capture a 100-degree field of view (FOV) using a 4×4 grid of sixteen total individual 6×6 mm2 scans...
September 2018: Quantitative Imaging in Medicine and Surgery
Florence Coscas, Diogo Cabral, Telmo Pereira, Carlos Geraldes, Hemaxi Narotamo, Alexandra Miere, Marco Lupidi, Alexandre Sellam, Ana Papoila, Gabriel Coscas, Eric Souied
PURPOSE: To characterize quantitative optical coherence tomography angiography (OCT-A) parameters in active neovascular age-related macular degeneration (nAMD) patients under treatment and remission nAMD patients. DESIGN: Retrospective, cross-sectional study. PARTICIPANTS: One hundred and four patients of whom 72 were in Group 1 (active nAMD) and 32 in Group 2 (remission nAMD) based on SD-OCT (Spectral Domain OCT) qualitative morphology. METHODS: This study was conducted at the Centre Ophtalmologique de l'Odeon between June 2016 and December 2017...
2018: PloS One
Hussam El Chehab, Emilie Agard, Corinne Dot
PURPOSE: The technological improvements in optical biometers have made cataract surgery evolve to the level of refractive surgery. This study assessed the correlation and agreement between a biometer using swept-source optical coherence tomography technology (IOLMaster 700; Carl Zeiss Meditec, Jena, Germany) and a biometer using optical low-coherence reflectometry (Lenstar; Haag Streit, Koeniz, Switzerland). PROCEDURES: Optical biometric measurements were taken with the IOLMaster 700 and the Lenstar on 129 eyes of 129 patients referred for cataract surgery...
October 7, 2018: European Journal of Ophthalmology
Ravi Parikh, Orly Gal-Or, Yoichi Sakurada, Belinda Leong, K Bailey Freund
PURPOSE: To describe the occurrence of an acquired choroidal nevus in a 73-year-old white man. METHODS: Case report. RESULTS: A 73-year-old white man was referred for an evaluation and treatment of macular changes in his left eye consistent with pachychoroid neovasculopathy. Baseline funduscopic examination and color fundus photographs showed two small peripheral choroidal nevi in the right eye and a single small choroidal nevus in the far temporal macula of the left eye...
October 3, 2018: Retinal Cases & Brief Reports
Angelo Maria Minnella, Valeria Pagliei, Maria Cristina Savastano, Matteo Federici, Matteo Bertelli, Paolo Enrico Maltese, Giorgio Placidi, Giovanni Corbo, Benedetto Falsini, Aldo Caporossi
BACKGROUND: Enhanced S-cone syndrome is an autosomal recessive retinal dystrophy related to a defect in a nuclear receptor gene (NR2E3) that leads to alteration in cells development from rod to S-cone. This retinal dystrophy may be associated with retinal schisis. The aim of this report is to describe structural optical coherence tomography and optical coherence tomography angiography features in a case of enhanced S-cone syndrome associated with macular schisis. CASE PRESENTATION: A Caucasian 13-year-old girl underwent measurement of best corrected visual acuity, ophthalmoscopic evaluation, and fundus autofluorescence examination...
October 3, 2018: Journal of Medical Case Reports
Siqing Yu, Beatrice E Frueh, Dagmar Steinmair, Andreas Ebneter, Sebastian Wolf, Martin S Zinkernagel, Marion R Munk
PURPOSE: To analyze retinal blood flow before and after cataract surgery using swept-source optical coherence tomography angiography (SS-OCTA). METHODS: Prospective observational study. Consecutive patients were recruited and scanned using SS-OCTA before and after cataract surgery. Laser flare photometry were performed post-surgery. Perfusion and vessel density of superficial (SCP) and deep capillary plexuses (DCP) of the 3 × 3 mm images as well as foveal avascular zone (FAZ) measurements were assessed...
2018: PloS One
P Struk, S Bargiel, Q A A Tanguy, F E Garcia Ramirez, N Passilly, P Lutz, O Gaiffe, H Xie, C Gorecki
In the rapid evolution of gastrointestinal endomicroscopy, optical coherence tomography (OCT) has found many diverse applications. Until recently, the micro-opto-electro-mechanical systems (MOEMS) technology has been playing a key role in shaping the miniaturization of these components. We report here, to the best of our knowledge, a novel endoscopic microsystem. It is based on a spectrally tuned MOEMS Mirau micro-interferometer integrated with micro-electro-mechanical systems (MEMS) electro-thermal micro-scanner, operating in the regime of swept-source (SS) OCT imaging...
October 1, 2018: Optics Letters
Khaled Abdelazeem, Mohamed Sharaf, Mohamed G A Saleh, Ahmed M Fathalla, Wael Soliman
PURPOSE: To evaluate the role of swept-source anterior segment optical coherence tomography (AS-OCT) in the diagnosis and management of laser in situ keratomileusis (LASIK) flap-related complications. METHODS: This prospective study included 25 eyes with LASIK flap-related complications imaged using swept-source AS-OCT between February and August 2016 at Alforsan Eye Centre, Assiut, Egypt. The images were acquired using a 6-mm line scan. RESULTS: Imaging of flap-related LASIK complications using AS-OCT revealed specific and nonspecific findings...
September 27, 2018: Cornea
Jingjiang Xu, Yuandong Li, Shaozhen Song, William Cepurna, John Morrison, Ruikang K Wang
We report the development of a 1300 nm swept-source optical coherence tomography (SS-OCT) system specifically designed to perform OCT imaging and optical microangiography (OMAG) in rat eyes in vivo and its use in evaluating the effects of intraocular pressure (IOP) elevation on ocular circulation. The swept laser is operated in single longitude mode with a 90 nm bandwidth centered at 1300 nm and 200 kHz A-line rate, providing remarkable sensitivity fall-off performance along the imaging depth, a larger field of view of 2...
September 26, 2018: Microvascular Research
Luana Osório Fernandes, Cláudia Cristina Brainer de Oliveira Mota, Hugo Otávio Oliveira, José Kayque Neves, Leógenes Maia Santiago, Anderson Stevens Leônidas Gomes
Optical coherence tomography (OCT) is one of the most important imaging modalities for biophotonics applications. In this work, an important step towards the clinical use of OCT in dental practice is reported, by following-up patients treated from periodontal disease (PD). 147 vestibular dental sites from 14 patients diagnosed with PD were evaluated prior and after treatment, using a swept-source OCT and two periodontal probes (Florida probe and North Carolina) for comparison. The evaluation was performed at four stages: day 0, day 30, day 60 and day 90...
September 27, 2018: Journal of Biophotonics
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"