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Hellen Cs Römkens, Henny Jm Beckers, Jan Sag Schouten, Tos Tjm Berendschot, Carroll Ab Webers
Purpose: The aim of this study is to generate reference values for anterior chamber morphometrics to facilitate the interpretation of anterior chamber images acquired with swept-source optical coherence tomography (SS-OCT) in a Caucasian population. Materials and methods: Non-glaucomatous Caucasian subjects, who were newly referred to the outpatient department of the University Eye Clinic Maastricht UMC+, were asked to undergo anterior segment assessment with SS-OCT imaging prior to routine eye examination (including visual acuity and refractive error measurements, Goldmann applanation tonometry, slit lamp examination and funduscopy)...
2018: Clinical Ophthalmology
Yana Fu, Wuying Zhou, Wei Li, Xiaolei Lin, Qi Dai
RATIONALE: The incidence of cornea disorders after laser peripheral iridotomy (LPI) is extremely low. However, cornea Descemet membrane detachment (DMD) combined with corneal decompensation after LPI could still occur. PATIENT CONCERNS: A 69-year-old Chinese woman presented with persistent widespread corneal edema and inferior bullous lesions in her right eye for half a year. She had undergone LPI in both eyes 10 years ago for a prophylactic treatment. The patient received a detailed examination of vivo corneal confocal microscopy and sept-source optical coherence tomography (SS-OCT)...
March 2018: Medicine (Baltimore)
Jorge Espigares, Juri Hayashi, Yasushi Shimada, Junji Tagami, Alireza Sadr
This study evaluated low-viscosity resin potential as enamel marginal gap sealant for existing composite restoration. Standard restorations with marginal gaps were created in bovine teeth; gaps were resealed using G-Bond Plus (GB, GC, Tokyo, Japan) or Icon (ICN, DMG, Hamburg, Germany) with or without HCl pretreatment (n=8). Swept-source optical coherence tomography (SSOCT) images were taken before and after resealing of the margin and thermal cycling to calculate enamel marginal gap extent. Cross-sectional microscopy was performed to confirm SS-OCT findings...
March 6, 2018: Dental Materials Journal
Satoshi Katagiri, Shin Tanaka, Tadashi Yokoi, Takaaki Hayashi, Emiko Matsuzaka, Kazuko Ueda, Tomoyo Yoshida-Uemura, Akira Arakawa, Sachiko Nishina, Kazuaki Kadonosono, Noriyuki Azuma
Purpose: To report the clinical and genetic findings of a male toddler who presented bilateral bullous retinoschisis with a novel RS1 mutation. Observations: This is an observational case report of a patient referred to our hospital with esotropia. A comprehensive ophthalmic examination was performed with the boy (age, 1 year 4 months) under general anesthesia that included fundus examinations, fluorescein angiography (FA), swept-source optical coherence tomography (SS-OCT), and full-field electroretinography (FF-ERG)...
April 2017: American Journal of Ophthalmology Case Reports
Nino Hirnschall, Ralph Varsits, Birgit Doeller, Oliver Findl
INTRODUCTION: The aim of this study was to find cases in which the axial eye length could not be measured with partial coherence interferometry (PCI) technology and to assess if it could be measured using swept source optical coherence tomography (ss-OCT) technology. METHODS: All patients were measured at their pre-assessment visit 1 week prior to cataract surgery using conventional optical biometry (PCI technology, IOLMaster 500, Carl Zeiss Meditec AG, Jena, Germany)...
March 1, 2018: Ophthalmology and Therapy
Xingyi Li, Wei Wang, Wenbin Huang, Shida Chen, Jiawei Wang, Zhonghao Wang, Yaoming Liu, Mingguang He, Xiulan Zhang
PURPOSE: To measure the anterior and posterior ocular biometric characteristics concurrently and to explore the relationship between iris, ciliary body and choroid in acute primary angle closure eyes (APAC) and fellow eyes. METHODS: It is a prospective, cross-sectional study. Thirty patients with recent APAC were finally enroled in it. Anterior and posterior uveal parameters were measured simultaneously by anterior segment optical coherence tomography (AS-OCT), swept-source optical coherence tomography (SS-OCT) and ultrasound biomicroscopy (UBM)...
March 1, 2018: Eye
Noel Padrón-Pérez, Luis Arias, Marcos Rubio, Daniel Lorenzo, Pere García-Bru, Jaume Català-Mora, José M Caminal
Purpose: We evaluate changes in choroidal thickness after intravitreal injection (IVI) therapy for pachychoroid neovasculopathy (PNV). Methods: An observational, retrospective, consecutive case series was studied of 18 patients (18 eyes) who underwent anti-vascular endothelial growth factor (VEGF) therapy for PNV. The 18 fellow eyes in these patients were used as controls. All eyes were evaluated with swept-source optical coherence tomography (SS-OCT) and optical coherence tomography angiography (OCTA)...
February 1, 2018: Investigative Ophthalmology & Visual Science
Jiqiang Kang, Pingping Feng, Xiaoming Wei, Edmund Y Lam, Kevin K Tsia, Kenneth K Y Wong
A swept source with both high repetition-rate and broad bandwidth is indispensable to enable optical coherence tomography (OCT) with high imaging rate and high axial resolution. However, available swept sources are commonly either limited in speed (sub-MHz) by inertial or kinetic component, or limited in bandwidth (<100 nm) by the gain medium. Here we report an ultrafast broadband (over 100 nm centered at 1.55-µm) all-fiber inertial-free swept source built upon a high-power dispersion-managed fiber laser in conjunction with an optical time-stretch module which bypasses complex optical amplification scheme, which result in a portable and compact implementation of time-stretch OCT (TS-OCT) at A-scan rate of 44...
February 19, 2018: Optics Express
Hideo Akiyama, Danjie Li, Yukitoshi Shimoda, Hidetaka Matsumoto, Shoji Kishi
PURPOSE: To describe the relationship between the vitreous and the neovascularization of the disc (NVD) using swept source optical coherence tomography (SS-OCT) and OCT angiography (OCTA). STUDY DESIGN: Retrospective. METHODS: We examined 17 eyes of 11 consecutive patients diagnosed as NVD associated with proliferative diabetic retinopathy (PDR). The location of the NVD feeder or collector vessels were examined by using RTVue XR Avanti. To determine the condition of the posterior vitreous detachment (PVD) and the proliferative tissue of the NVD, we performed 12 mm horizontal and vertical scans through the disc using SS-OCT...
February 19, 2018: Japanese Journal of Ophthalmology
Swarup S Swaminathan, Fang Zheng, Andrew R Miller, Giovanni Gregori, Janet L Davis, Philip J Rosenfeld
A 30-year-old woman with photopsias and decreased vision was diagnosed with multiple evanescent white dot syndrome (MEWDS) with an atypical inflammatory subfoveal retinal pigment epithelial detachment (PED) and imaged using swept-source optical coherence tomography (SS-OCT) during several visits. SS-OCT imaging revealed a focal area of attenuated choriocapillaris underneath the PED. An attempt to treat the presumed macular inflammatory lesion with corticosteroids resulted in bilateral exudation consistent with central serous chorioretinopathy...
February 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
Chen D Lu, Nadia K Waheed, Andre Witkin, Caroline R Baumal, Jonathan J Liu, Benjamin Potsaid, Anthony Joseph, Vijaysekhar Jayaraman, Alex Cable, Kinpui Chan, Jay S Duker, James G Fujimoto
BACKGROUND AND OBJECTIVE: To demonstrate the feasibility of retinal and anterior segment intraoperative widefield imaging using an ultrahigh-speed, swept-source optical coherence tomography (SS-OCT) surgical microscope attachment. PATIENTS AND METHODS: A prototype post-objective SS-OCT using a 1,050-nm wavelength, 400 kHz A-scan rate, vertical cavity surface-emitting laser (VCSEL) light source was integrated to a commercial ophthalmic surgical microscope after the objective...
February 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
Alberto de Castro, Antonio Benito, Silvestre Manzanera, Juan Mompeán, Belén Cañizares, David Martínez, Jose María Marín, Ireneusz Grulkowski, Pablo Artal
Purpose: To image, describe, and characterize different features visible in the crystalline lens of older adults with and without cataract when imaged three-dimensionally with a swept-source optical coherence tomography (SS-OCT) system. Methods: We used a new SS-OCT laboratory prototype designed to enhance the visualization of the crystalline lens and imaged the entire anterior segment of both eyes in two groups of participants: patients scheduled to undergo cataract surgery, n = 17, age range 36 to 91 years old, and volunteers without visual complains, n = 14, age range 20 to 81 years old...
February 1, 2018: Investigative Ophthalmology & Visual Science
Ling Wang, Ming-En Xu, Li Luo, Yongyong Zhou, Peijian Si
For three-dimensional bio-printed cell-laden hydrogel tissue constructs, the well-designed internal porous geometry is tailored to obtain the desired structural and cellular properties. However, significant differences often exist between the designed and as-printed scaffolds because of the inherent characteristics of hydrogels and cells. In this study, an iterative feedback bio-printing (IFBP) approach based on optical coherence tomography (OCT) for the fabrication of cell-laden hydrogel scaffolds with optimal geometrical fidelity and cellular controllability was proposed...
February 12, 2018: Scientific Reports
Rida Shahzad, M A Rehman Siddiqui, Sidra Zafar, Farzana Kausar, Masroor H Shahzad
OBJECTIVE: The aim of this study was to assess changes in subfoveal choroidal thickness (SFCT), measured using swept-source optical coherence tomography (SS-OCT), after routine phacoemulsification cataract surgery. DESIGN: This is a prospective, interventional, controlled study that took place at Shahzad Eye Hospital, Karachi, Pakistan, between February 2015 and January 2016. PARTICIPANTS: One hundred and one patients who were undergoing routine cataract surgery were recruited...
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Wadim Bowl, Marianne Bowl, Silke Schweinfurth, Kerstin Holve, Monika Andrassi-Darida, Knut Stieger, Birgit Lorenz
AIM: Comparison of choroidal thickness (CT) and foveal morphology as seen with swept-source optical coherence tomography (SS-OCT) in children with a history of treated or spontaneously regressed retinopathy of prematurity (tROP or srROP) to assess the impact on best-corrected visual acuity (BCVA). METHODS: CT was measured by SS-OCT (DRI-OCT Triton; Topcon, USA) single scans of a 6-mm diameter around the fovea in 17 children with tROP or srROP (4-7 years of age) and compared to 25 controls (age-matched children and adults)...
February 7, 2018: Ophthalmic Research
Thomas DiLazaro, George Nehmetallah
Optical frequency-modulated continuous-wave (FMCW) reflectometry is a ranging technique that allows for high-resolution distance measurements over long ranges. Similarly, swept-source optical coherence tomography (SS-OCT) provides high-resolution depth imaging over typically shorter distances and higher scan speeds. In this work, we demonstrate a low-cost, low-bandwidth 3D imaging system that provides the high axial resolution imaging capability normally associated with SS-OCT over typical FMCW ranging depths...
February 5, 2018: Optics Express
Beatriz Abadia, Ines Suñen, Pilar Calvo, Francisco Bartol, Guayente Verdes, Antonio Ferreras
OBJECTIVE: To compare choroidal thickness between patients with type 2 diabetes (T2D) and healthy controls measured using swept-source optical coherence tomography (SS-OCT). METHODS: The sample comprised 157 eyes of 94 T2D patients, 48 eyes of which had diabetic macular edema (DME), and 71 normal eyes of 38 healthy patients. Subfoveal (SF) choroidal thickness, and choroidal thickness at 500-μm intervals up to 2500 μm nasal and temporal from the fovea were measured using the SS-OCT...
2018: PloS One
Francisco Arnalich-Montiel, Sara Ortiz-Toquero, Clara Auladell, Ana Couceiro
PURPOSE: To assess intraobserver repeatability, intersession reproducibility, and agreement of swept-source Fourier-domain optical coherence tomography (SS-OCT) and the Scheimpflug camera in measuring corneal thickness in virgin and grafted eyes with Fuchs endothelial corneal dystrophy (FECD). METHODS: Thirty-six control eyes, 35 FECD eyes, 30 FECD with corneal edema eyes, 25 Descemet stripping automated endothelial keratoplasty (DSAEK) eyes, and 29 Descemet membrane endothelial keratoplasty (DMEK) eyes were included...
January 30, 2018: Cornea
Christophe Panthier, Justine Burgos, Helene Rouger, Alain Saad, Damien Gatinel
PURPOSE: To assess a new objective cataract grading method based on lens densitometry on swept-source optical coherence tomography (SS-OCT) scans provided by the IOLMaster 700. SETTINGS: Rothschild Foundation, Paris, France. DESIGN: Prospective case series. METHODS: All patients consulting for cataract evaluation who provided their consent to participate in the study were included. A history of eye surgery, corneal or retinal disorders, and ocular dryness were exclusion criteria...
December 2017: Journal of Cataract and Refractive Surgery
N Padrón-Pérez, J Català-Mora, J Díaz, L Arias, J Prat, J M Caminal
PurposeTo explore the structural features of juvenile X-linked retinoschisis (XLRS) using swept-source-optical coherence tomography (SS-OCT) and optical coherence tomography angiography (OCT-A).DesignRetrospective, observational cross-sectional study.Patients and methodsNine patients (18 eyes) diagnosed with juvenile XLRS were included. SS-OCT and OCT-A were used to evaluate the characteristics of the inner/outer retina and the choroid.ResultsSS-OCT showed that the inner nuclear layer (INL) was the most commonly affected area (16/18 eyes; 89%)...
January 5, 2018: Eye
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