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optical coherence tomograph

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https://www.readbyqxmd.com/read/29135076/a-heterozygous-mutation-in-rpgr-associated-with-x-linked-retinitis-pigmentosa-in-a-patient-with-turner-syndrome-mosaicism-45-x-46-xx
#1
Qi Zhou, Fengxia Yao, Feng Wang, Hui Li, Rui Chen, Ruifang Sui
Turner syndrome with retinitis pigmentosa (RP) is rare, with only three cases reported based on clinical examination alone. We summarized the 4-year follow-up and molecular findings in a 28-year-old patient with Turner syndrome and the typical features of short stature and neck webbing, who also had X-linked RP. Her main complaints were night blindness and progressive loss of vision since the age of 9 years. Ophthalmologic examination, optical coherent tomographic imaging, and visual electrophysiology tests showed classic manifestations of RP...
November 14, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29125012/optical-assessment-of-the-in-vivo-tympanic-membrane-status-using-a-handheld-optical-coherence-tomography-based-otoscope
#2
Kibeom Park, Nam Hyun Cho, Mansik Jeon, Sang Heun Lee, Jeong Hun Jang, Stephen A Boppart, Woonggyu Jung, Jeehyun Kim
OBJECTIVE: Conventional otoscopes and oto-endoscopes, which are used to examine the tympanic membrane (TM), do not provide tomographic information. Optical coherence tomography (OCT) non-invasively reveals the depth-resolved internal microstructure of the TM with very high spatial resolution. We designed this study to examine the TMs with middle ear diseases using a handheld otoscope employing 860 nm spectral domain (SD)-OCT, combined with video camera and to demonstrate the clinical applicability of this system...
November 10, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29122823/comparative-evaluation-of-progression-rate-in-keratoconus-before-and-after-collagen-crosslinking
#3
Yu Meng Wang, Tommy Cy Chan, Marco C Y Yu, Vishal Jhanji
PURPOSE: To compare the rate of disease progression in keratoconus before and after corneal collagen crosslinking (CXL). METHODS: 145 eyes were followed without CXL (no-CXL group) for a median duration of 31 months whereas 45 eyes were followed up for 41 months before (pre-CXL) and after (post-CXL) accelerated, epithelium-off crosslinking. Progression was defined based on significant slope found in linear mixed effect models against time. Swept-source optical coherence tomography was used for measurement of anterior steep keratometry, anterior flat keratometry (Ant Kf), anterior average keratometry (Ant Avg K); posterior steep keratometry, posteriorflat keratometry (Post Kf), posterior average keratometry (Post Avg K) and corneal thickness...
November 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29122818/optical-coherence-tomographic-angiography-identifies-peripapillary-microvascular-dilation-and-focal-non-perfusion-in-giant-cell-arteritis
#4
Eric D Gaier, Aubrey L Gilbert, Dean M Cestari, John B Miller
AIMS: We set out to determine the optical coherence tomographic angiography (OCT-A) characteristics of arteritic anterior ischaemic optic neuropathy (AAION) in the context of giant cell arteritis (GCA). METHODS: This is an observational case series of four patients with AAION secondary to GCA, three with unilateral AAION and one with bilateral AAION. We reviewed the charts, fundus photography, visual fields, fluorescein angiography (FA) and OCT-A images for all patients to identify a unifying theme in a range of AAION clinical severity...
November 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29118506/localized-retinal-degeneration-secondary-to-waldenstr%C3%A3-m-s-macroglobulinemia
#5
Dhanashree Ratra, Vineet Ratra, Mansi Kishnani
A 52-year-old man, treated for Waldenström's macroglobulinemia (WM), continued to experience decreased vision even after 24 months. He was evaluated using multimodal imaging and electroretinography. The retina did not show any hyperviscosity changes but revealed a yellow lesion at macula with atrophic changes causing a pattern on fluorescein angiography similar to a leopard's skin. Optical coherence tomographic imaging revealed uniformly reflective material deposited in the outer retina with degeneration of outer retinal layers...
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29104179/safety-of-6-month-dual-antiplatelet-therapy-after-second-generation-drug-eluting-stent-implantation-optima-c-randomized-clinical-trial-and-oct-substudy
#6
Byoung-Kwon Lee, Jung-Sun Kim, Oh-Huyn Lee, Pil-Ki Min, Young-Won Yoon, Bum-Kee Hong, Dong-Ho Shin, Tae-Soo Kang, Byung Ok Kim, Duk-Kyu Cho, Dong Woon Jeon, Sung-Ill Woo, Seonghoon Choi, Byung-Ryul Cho, Woong-Chol Kang, Seunghwan Kim, Byeong-Keuk Kim, Myeong-Ki Hong, Yangsoo Jang, Hyuck Moon Kwon
AIMS: There are few randomized studies of the optimal duration of dual antiplatelet therapy (DAPT) for patients who receive a second-generation drug-eluting stent (DES). METHODS AND RESULTS: A prospective, randomized, multicenter trial was performed at 10 medical centers. The 1,368 patients included in the study received a biolimus-eluting stent (BES) or zotarolimus-eluting stent (ZES). The primary outcome measured was the composite of major adverse cardiac events (MACEs), including cardiac death, myocardial infarction (MI), or ischemia-driven target lesion revascularization at the 12-month follow-up...
November 7, 2017: EuroIntervention
https://www.readbyqxmd.com/read/29065642/the-use-of-optical-coherence-tomography-in-dental-diagnostics-a-state-of-the-art-review
#7
REVIEW
Monika Machoy, Julia Seeliger, Liliana Szyszka-Sommerfeld, Robert Koprowski, Tomasz Gedrange, Krzysztof Woźniak
Optical coherence tomography provides sections of tissues in a noncontact and noninvasive manner. The device measures the time delay and intensity of the light scattered or reflected from biological tissues, which results in tomographic imaging of their internal structure. This is achieved by scanning tissues at a resolution ranging from 1 to 15 μm. OCT enables real-time in situ imaging of tissues without the need for biopsy, histological procedures, or the use of X-rays, so it can be used in many fields of medicine...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065014/inverted-internal-limiting-membrane-flap-technique-for-treatment-of-macular-hole-retinal-detachment-in-highly-myopic-eyes
#8
Hiroyuki Takahashi, Makoto Inoue, Takashi Koto, Yuji Itoh, Kazunari Hirota, Akito Hirakata
PURPOSE: To compare the efficacy of vitrectomy with inverted internal limiting membrane (ILM) flap to complete removal of the ILM for the treatment of macular hole (MH) retinal detachment in highly myopic eyes. METHODS: Pars plana vitrectomy with inverted ILM flap technique (16 eyes; inverted group) or with the complete removal of the ILM (16 eyes; removed group) was performed in patients with high myopia with MH retinal detachment. The rate of retinal reattachment and MH closure, the best-corrected visual acuities, and the integrity of the foveal microstructures in the optical coherence tomographic images were compared...
October 23, 2017: Retina
https://www.readbyqxmd.com/read/29045329/hybrid-deep-learning-on-single-wide-field-optical-coherence-tomography-scans-accurately-classifies-glaucoma-suspects
#9
Hassan Muhammad, Thomas J Fuchs, Nicole De Cuir, Carlos G De Moraes, Dana M Blumberg, Jeffrey M Liebmann, Robert Ritch, Donald C Hood
PURPOSE: Existing summary statistics based upon optical coherence tomographic (OCT) scans and/or visual fields (VFs) are suboptimal for distinguishing between healthy and glaucomatous eyes in the clinic. This study evaluates the extent to which a hybrid deep learning method (HDLM), combined with a single wide-field OCT protocol, can distinguish eyes previously classified as either healthy suspects or mild glaucoma. METHODS: In total, 102 eyes from 102 patients, with or suspected open-angle glaucoma, had previously been classified by 2 glaucoma experts as either glaucomatous (57 eyes) or healthy/suspects (45 eyes)...
October 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29040280/quantitative-analysis-of-neural-tissues-around-the-optic-disc-after-panretinal-photocoagulation-in-patients-with-diabetic-retinopathy
#10
Hyun Seung Yang, June-Gone Kim, Jae Bong Cha, Young In Yun, Jong Hoon Park, Jong Eun Woo
In this retrospective cross-sectional study, we quantitatively analyzed the tomographic features in the neural tissues around the optic disc in patients with diabetic retinopathy with and without panretinal photocoagulation. We analyzed 206 eyes, comprising 33 normal eyes in subjects without diabetes (group I), 30 eyes without diabetic retinopathy (group II), 66 eyes with non-proliferative diabetic retinopathy (group III), 45 eyes with panretinal photocoagulation (group IV), and 32 eyes with normal tension glaucoma (group V)...
2017: PloS One
https://www.readbyqxmd.com/read/28991620/new-perspectives-on-the-detection-and-progression-of-keratoconus
#11
REVIEW
Antonio Martínez-Abad, David P Piñero
Laser refractive surgery has increased markedly in recent years, making the detection of corneal abnormalities extremely relevant. For this reason, an accurate diagnosis of clinical or subclinical keratoconus is critical. Corneal topography is the primary diagnostic tool for keratoconus detection, and pachymetry data and corneal aberrations are also commonly used. Recently, tomographic measurements using optical coherence tomography and corneal biomechanical indices have been used. In incipient and subclinical keratoconus, the use of a single parameter as a diagnostic factor is not sufficiently accurate...
September 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28986597/associations-between-outer-retinal-structures-and-focal-macular-electroretinograms-in-patients-with-retinitis-pigmentosa
#12
Taro Kominami, Shinji Ueno, Azusa Kominami, Ayami Nakanishi, Shunsuke Yasuda, Chang-Hua Piao, Satoshi Okado, Hiroko Terasaki
Purpose: Our earlier study showed that the width of the intact ellipsoid zone (EZ) of the photoreceptors was significantly but weakly correlated with the amplitudes of the focal macular ERGs (FMERGs). The aim of this study was to determine a microstructure of the photoreceptors in the spectral-domain optical coherence tomographic (SD-OCT) images that was more strongly correlated with the FMERG parameters in eyes with retinitis pigmentosa (RP). Methods: This was a retrospective, observational study...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28980002/changes-in-choroidal-blood-flow-and-morphology-in-response-to-increase-in-intraocular-pressure
#13
Tomohiko Akahori, Takeshi Iwase, Kentaro Yamamoto, Eimei Ra, Hiroko Terasaki
Purpose: The purpose of this study was to determine the effects of an elevation in IOP on the choroidal blood flow and morphology. Methods: We studied 27 healthy subjects. The mean blur rate (MBR) determined by laser speckle flowgraphy was used to measure the choroidal blood flow. The subfoveal choroidal thickness (SFCT) was measured in the optical coherence tomographic images of the macular region. The luminal and stromal areas of the choroid were determined by the binarization method before, during, and after the IOP was elevated 20 and 30 mm Hg with pressure using an ophthalmodynamometer...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28977805/tomographic-structural-changes-of-retinal-layers-after-internal-limiting-membrane-peeling-for-macular-hole-surgery
#14
Mun Yueh Faria, Nuno P Ferreira, Diana M Cristóvao, Sofia Mano, David Cordeiro Sousa, Manuel Monteiro-Grillo
PURPOSE: To highlight tomographic structural changes of retinal layers after internal limiting membrane (ILM) peeling in macular hole surgery. METHODS: Nonrandomized prospective, interventional study in 38 eyes (34 patients) subjected to pars plana vitrectomy and ILM peeling for idiopathic macular hole. Retinal layers were assessed in nasal and temporal regions before and 6 months after surgery using spectral domain optical coherence tomography. RESULTS: Total retinal thickness increased in the nasal region and decreased in the temporal region...
October 5, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28973322/intraretinal-correlates-of-reticular-pseudodrusen-revealed-by-autofluorescence-and-en-face-oct
#15
Maarjaliis Paavo, Winston Lee, John Merriam, Srilaxmi Bearelly, Stephen Tsang, Stanley Chang, Janet R Sparrow
Purpose: We sought to determine whether information revealed from the reflectance, autofluorescence, and absorption properties of RPE cells situated posterior to reticular pseudodrusen (RPD) could provide insight into the origins and structure of RPD. Methods: RPD were studied qualitatively by near-infrared fundus autofluorescence (NIR-AF), short-wavelength fundus autofluorescence (SW-AF), and infrared reflectance (IR-R) images, and the presentation was compared to horizontal and en face spectral domain optical coherence tomographic (SD-OCT) images...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28953598/the-impact-of-scleral-contact-lens-vault-on-visual-acuity-and-comfort
#16
Heinz Otchere, Lyndon Jones, Luigina Sorbara
PURPOSE: To assess how varying degrees of corneal clearance of scleral contact lenses (ScCL) impact visual acuity (VA) and comfort in patients with corneal ectasia. METHOD: Three ScCL were fitted to 20 subjects with previous diagnosis of either keratoconus (n=18) or pellucid marginal degeneration (n=2). Fitting of ScCL was based on corneal sagittal height (CSH) measured with Visante OCT at a 15-mm chord on the horizontal meridian. To select the ScCL from the diagnostic lens set, values of 325, 375, and 425 μm were randomly added in sequence to CSH...
September 26, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28945651/accuracy-and-repeatability-of-an-anterior-segment-swept-source-optical-coherence-tomographer
#17
Rajini Peguda, Pauline Kang, Vinod Maseedupally, Helen Swarbrick
OBJECTIVES: To assess accuracy and repeatability of the CASIA swept-source optical coherence tomographer (SS-OCT) in measuring contact lens (CL) radii of curvature and thicknesses compared with verified CL parameters and to investigate intrasession and intersession repeatability of the CASIA SS-OCT in measuring epithelial and total corneal thicknesses. METHODS: Rigid CLs with varying radii of curvature (front, rf; back, rb) and thicknesses were imaged with the CASIA SS-OCT across two sessions...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28910439/spectral-domain-optical-coherence-tomographic-angiography-in-children-with-amblyopia
#18
Marcela Lonngi, Federico G Velez, Irena Tsui, Juan Pablo Davila, Mansour Rahimi, Clarissa Chan, David Sarraf, Joseph L Demer, Stacy L Pineles
Importance: Amblyopia is the most common cause of visual impairment in childhood, with a prevalence of 1% to 4% in children in the United States. To date, no studies using noninvasive optical coherence tomographic angiography (OCTA) have measured blood flow in the retinal capillary layers in children with amblyopia. Objective: To evaluate the retinal and microvascular features using OCTA in children (<18 years) with amblyopia. Design, Setting, and Participants: This observational case-control study enrolled patients from September 1, 2016, through May 31, 2017, and was conducted from September 1, 2016, through June 30, 2017, at the Stein Eye Institute at UCLA (University of California, Los Angeles)...
October 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28910435/repeatability-and-reproducibility-of-superficial-macular-retinal-vessel-density-measurements-using-optical-coherence-tomography-angiography-en-face-images
#19
Jianqin Lei, Mary K Durbin, Yue Shi, Akihito Uji, Siva Balasubramanian, Elmira Baghdasaryan, Mayss Al-Sheikh, Srinivas R Sadda
Importance: The repeatability and reproducibility of quantitative metrics from optical coherence tomographic angiography (OCTA) must be assessed before these data can be confidently interpreted in clinical research and practice. Objective: To evaluate the repeatability and reproducibility of OCTA-derived retinal vascular quantitative metrics. Design, Setting and Participants: In this cross-sectional study, 21 healthy volunteers (42 eyes) and 22 patients with retinal disease (22 eyes), including 14 with age-related macular degeneration, 3 with epiretinal membrane, 2 with diabetic retinopathy, 2 with myopic macular degeneration, and 1 with retinal vein occlusion, were enrolled...
October 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28910424/the-arc-of-change-in-optical-coherence-tomographic-angiography-technology-progression-toward-greater-reliability
#20
Sean T Garrity, David Sarraf
No abstract text is available yet for this article.
October 1, 2017: JAMA Ophthalmology
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