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Ocular coherence tomography

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https://www.readbyqxmd.com/read/29327060/optical-coherence-tomography-analysis-of-the-optic-nerve-head-and-surrounding-structures-in-long-duration-international-space-station-astronauts
#1
Nimesh Patel, Anastas Pass, Sara Mason, Charles R Gibson, Christian Otto
Importance: After long-duration spaceflight, morphological changes in the optic nerve head (ONH) and surrounding tissues have been reported. Objective: To develop methods to quantify ONH and surrounding tissue changes using preflight and postflight optical coherence tomographic scans of the ONH region. Design, Setting, and Participants: Two separate analyses were done on retrospective data, with the first comparing a preflight group with a control group, followed by preflight to postflight analysis...
January 11, 2018: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29326849/spectral-domain-optical-coherence-tomography-findings-in-carotid-artery-disease
#2
Akın Çakır, Eyüp Düzgün, Serkan Demir, Yavuz Çakır, Melih Hamdi Ünal
Objectives: To evaluate the effect of carotid artery disease on retinal morphology by means of spectral domain optical coherence tomography (SD-OCT). Materials and Methods: We examined 23 eyes with internal carotid artery (ICA) stenosis and 24 age- and gender-matched healthy eyes as a control group in this prospective, case-control study. Compherensive ophthalmic examination and SD-OCT scan were performed to all the patients. The average RNFL and macular thicknesses (MT) in the nine macular ETDRS areas were the major OCT measurements for our study...
December 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29325389/-development-of-en-face-optical-coherence-tomography-and-its-application-in-ocular-fundus-diseases
#3
Y Zhou, M Wang
Optical coherence tomography (OCT) is able to obtain the cross-sectional image of the fundus noninvasively and quickly. The cross-sectional image in vivo almost matches the histological section of the retina. OCT has become the most important imaging tool in ophthalmology. Based on the latest OCT technology, en face OCT is a new imaging technique that reveals the structure of retinal and choroidal sections approximately paralleled to the retina surface. Compared to the conventional OCT, en face OCT provides more comprehensive information and makes more accurate diagnosis and assessment of the prognosis...
December 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29324896/correlation-of-the-anterior-ocular-segment-biometry-with-hba1c-level-in-type-2-diabetes-mellitus-patients
#4
Abd-Rashid Suraida, Mohtar Ibrahim, Embong Zunaina
OBJECTIVES: To compare the anterior ocular segment biometry among Type 2 diabetes mellitus (DM) with no diabetic retinopathy (DR) and non-proliferative diabetic retinopathy (NPDR), and to evaluate the correlation of anterior ocular segment biometry with HbA1c level. METHODS: A cross-sectional study was conducted in Hospital Universiti Sains Malaysia, Kelantan from November 2013 till May 2016 among Type 2 DM patients (DM with no DR and DM with NPDR). The patients were evaluated for anterior ocular segment biometry [central corneal thickness (CCT), anterior chamber width (ACW), angle opening distance (AOD) and anterior chamber angle (ACA)] by using Anterior Segment Optical Coherence Tomography (AS-OCT)...
2018: PloS One
https://www.readbyqxmd.com/read/29324592/frequent-subclinical-macular-changes-in-combined-braf-mek-inhibition-with-high-dose-hydroxychloroquine-as-treatment-for-advanced-metastatic-braf-mutant-melanoma-preliminary-results-from-a-phase-i-ii-clinical-treatment-trial
#5
Akosua A Nti, Leona W Serrano, Harpal S Sandhu, Katherine E Uyhazi, Ilaina D Edelstein, Elaine J Zhou, Scott Bowman, Delu Song, Tara C Gangadhar, Lynn M Schuchter, Sheryl Mitnick, Alexander Huang, Charles W Nichols, Ravi K Amaravadi, Benjamin J Kim, Tomas S Aleman
PURPOSE: To assess the potential ocular toxicity of a combined BRAF inhibition (BRAFi) + MEK inhibition (MEKi) + hydroxychloroquine (HCQ) regime used to treat metastatic BRAF mutant melanoma. METHODS: Patients with stage IV metastatic melanoma and BRAF V600E mutations (n = 11, 31-68 years of age) were included. Treatment was with oral dabrafenib, 150 mg bid, trametinib, 2 mg/day, and HCQ, 400 mg to 600 mg bid. An ophthalmic examination, spectral domain optical coherence tomography, near-infrared and short-wavelength fundus autofluorescence, and static perimetry were performed at baseline, 1 month, and q/6 months after treatment...
January 10, 2018: Retina
https://www.readbyqxmd.com/read/29318471/aav-mediated-gene-delivery-of-the-calreticulin-anti-angiogenic-domain-inhibits-ocular-neovascularization
#6
Leilei Tu, Jiang-Hui Wang, Veluchamy A Barathi, Selwyn M Prea, Zheng He, Jia Hui Lee, James Bender, Anna E King, Grant J Logan, Ian E Alexander, Youn-Shen Bee, Ming-Hong Tai, Gregory J Dusting, Bang V Bui, Jingxiang Zhong, Guei-Sheung Liu
Ocular neovascularization is a common pathological feature in diabetic retinopathy and neovascular age-related macular degeneration that can lead to severe vision loss. We evaluated the therapeutic efficacy of a novel endogenous inhibitor of angiogenesis, the calreticulin anti-angiogenic domain (CAD180), and its functional 112-residue fragment, CAD-like peptide 112 (CAD112), delivered using a self-complementary adeno-associated virus serotype 2 (scAAV2) in rodent models of oxygen-induced retinopathy and laser-induced choroidal neovascularization...
January 9, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29318383/optical-coherence-tomography-angiography-a-review-of-current-and-future-clinical-applications
#7
REVIEW
Marcus Ang, Anna C S Tan, Chui Ming Gemmy Cheung, Pearse A Keane, Rosa Dolz-Marco, Chelvin C A Sng, Leopold Schmetterer
Optical coherence tomography angiography is a non-invasive imaging technique that now allows for simultaneous in vivo imaging of the morphology as well as the vasculature in the eye. In this review, we provide an update on the existing clinical applications of optical coherence tomography angiography technology from the anterior to posterior segment of the eye. We also discuss the limitations of optical coherence tomography angiography technology, as well as the caveats to the interpretation of images. As current optical coherence tomography angiography systems are optimized for the retina, most studies have focused on interpreting images from conditions such as age related macular degeneration and retinal vascular diseases...
January 9, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29317400/two-year-outcomes-of-intravitreal-ziv-aflibercept
#8
Ahmad M Mansour, Mohammed Ashraf, Abdulrazzak Charbaji, Muhammad H Younis, Ahmed A Souka, Avantika Dogra, Hana A Mansour, Jay Chhablani
AIM: To assess the two-year outcome of intravitreal ziv-aflibercept (IVZ) in eyes with macular diseases. METHODS: Consecutive subjects with various macular diseases that received six or more of 0.05 mL IVZ (1.25 mg) injections with at least 1 year follow-up were included. Outcome measures were best-corrected visual acuity (BCVA) (logarithm of the minimum angle of resolution) and central macular thickness (CMT) on spectral domain optical coherence tomography...
January 9, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29314142/retinoblastoma-the-visible-cns-tumor-a-review
#9
Helen Dimaras, Timothy W Corson
The pediatric ocular cancer retinoblastoma is the only central nervous system (CNS) tumor readily observed without specialized equipment: it can be seen by, and in, the naked eye. This accessibility enables unique imaging modalities. Here, we review this cancer for a neuroscience audience, highlighting these clinical and research imaging options, including fundus imaging, optical coherence tomography, ultrasound, and magnetic resonance imaging. We also discuss the subtype of retinoblastoma driven by the MYCN oncogene more commonly associated with neuroblastoma, and consider trilateral retinoblastoma, in which an intracranial tumor arises along with ocular tumors in patients with germline RB1 gene mutations...
January 3, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29311586/the-corneal-subbasal-nerve-plexus-and-thickness-of-the-retinal-layers-in-pediatric-type-1-diabetes-and-matched-controls
#10
Aline Götze, Sophie von Keyserlingk, Sabine Peschel, Ulrike Jacoby, Corinna Schreiver, Bernd Köhler, Stephan Allgeier, Karsten Winter, Martin Röhlig, Anselm Jünemann, Rainer Guthoff, Oliver Stachs, Dagmar-C Fischer
Optical coherence tomography (OCT) of the retina and corneal confocal laser scanning microscopy (CLSM) of the subbasal nerve plexus (SBP) are noninvasive techniques for quantification of the ocular neurodegenerative changes in individuals with type 1 diabetes mellitus (T1DM). In adult T1DM patients these changes are hardly related to T1DM only. Instead, ageing and/or lifestyle associated comorbidities have to be considered as putative confounding variables. Therefore, we investigated pediatric T1DM patients (n = 28; 14...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29310395/delayed-onset-of-pressure-induced-interlamellar-stromal-keratitis-in-a-patient-with-recurrent-uveitis-a-case-report
#11
Che-Yuan Kuo, Yu-Fan Chang, Yu-Bai Chou, Chih-Chien Hsu, Pei-Yu Lin, Catherine Jui-Ling Liu
INTRODUCTION: Corticosteroid treatment for uveitis can lead to delayed-onset pressure-induced interlamellar stromal keratitis (PISK), even years after laser in situ keratomileusis (LASIK).A 35-year-old man presented to our clinic after experiencing blurred vision in his left eye for 1 month. For the past month, he had been prescribed topical steroid and anti-glaucomatous medication. He had undergone LASIK for both eyes 5 years earlier, and had suffered uveitis attacks in his left eye over the last 2 years...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29303879/comparison-of-peripapillary-oct-angiography-vessel-density-and-retinal-nerve-fiber-layer-thickness-measurements-for-their-ability-to-detect-progression-in-glaucoma
#12
Gábor Holló
PURPOSE: To investigate the applicability of peripapillary optical coherence tomography angiography angioflow vessel-density measurements in the retinal nerve fiber layer for the detection of glaucomatous progression; and to compare its performance with that of retinal nerve fiber layer thickness (RNFLT) measurements. METHODS: Prospective RNFLT and vessel-density measurements with the same Angiovue/RTVue-XR instrument were made immediately after each other on one eye of 9 normal, 20 under treatment ocular hypertensive (OHT) and 24 under treatment open-angle glaucoma patients at 6-month intervals for 2 years (5 visits for all eyes)...
January 4, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29303876/optical-coherence-tomography-angiography-description-of-ocular-decompression-retinopathy-after-deep-sclerectomy-in-traumatic-glaucoma
#13
Lauriane Salinas, Ankita Chaudhary, Kaweh Mansouri
PURPOSE: To present a case of ocular decompression retinopathy (ODR) occurring after uncomplicated deep sclerectomy with Mitomycin C using optical coherence tomography angiography (OCTA). PATIENT AND METHOD: Single case report. RESULTS: A 55-year-old man with traumatic glaucoma in the right eye complained of blurred vision. Visual acuity was 20/25 and intraocular pressure (IOP) was 50▒mm Hg. Deep sclerectomy with Mitomycin C was performed...
January 4, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29300238/erythropoietin-in-treatment-of-methanol-optic-neuropathy
#14
Farzad Pakdel, Mostafa S Sanjari, Asieh Naderi, Niloofar Pirmarzdashti, Anousheh Haghighi, Mohsen B Kashkouli
BACKGROUND: Methanol poisoning can cause an optic neuropathy that is usually severe and irreversible and often occurs after ingestion of illicit or homemade alcoholic beverages. In this study, we evaluated the potential neuroprotective effect of erythropoietin (EPO) on visual acuity (VA) in patients with methanol optic neuropathy. METHODS: In a prospective, noncomparative interventional case series, consecutive patients with methanol optic neuropathy after alcoholic beverage ingestion were included...
January 3, 2018: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29297794/the-eye-of-the-azara-s-agouti-dasyprocta-azarae-morphological-observations-and-selected-ophthalmic-diagnostic-tests
#15
André Tavares-Somma, Nathália Seabra, Bret A Moore, Mario Sato, Rogério R Lange, Fabiano Montiani-Ferreira
The purpose of this study was to carry out a descriptive investigation of the Azara's agouti ( Dasyprocta azarae) eye and to establish reference values of select ophthalmic diagnostic tests and physiologic parameters. A total of 19 healthy agoutis were used. Select ophthalmic diagnostic tests were performed, including Schirmer tear test type I (STTI), analysis of the conjunctival bacterial microflora, corneal esthesiometry, and tonometry. B-mode ultrasonic biometry, fundus photography, optical coherence tomography, and gross and histologic analysis of two eyes were also performed...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29297099/assessment-of-corneal-biomechanical-properties-with-inflation-test-using-optical-coherence-tomography
#16
Like Wang, Lei Tian, Yanping Huang, Yifei Huang, Yongping Zheng
Biomechanical properties are important for the cornea to maintain its normal shape and function. There is still a need to develop better methods for accurate measurement of corneal mechanical properties. In this study, we propose to introduce the optical coherence tomography (OCT) in inflation test for the imaging of corneal deformation in order to measure its biomechanical properties. Ten cornea-mimicking silicone phantoms with different stiffness and five fresh porcine corneas were tested using the proposed method...
January 2, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29290187/peripapillary-retinal-nerve-fiber-layer-rnfl-thickness-measurements-by-topcon-sd-oct-in-myopic-patients
#17
Nadia Akhtar, Ayisha Kausar, Farooq Afzal, Syed Khalid Ali, Nida Hamid
OBJECTIVE: To evaluate the effect of low-to-moderate myopia on peripapillary retinal nerve fiber layer (RNFL) thickness measured by Topcon SD optical coherence tomography (OCT). STUDY DESIGN: Cross-sectional study. PLACE AND DURATION OF STUDY: Ophthalmology Department, Shifa Foundation Falahee Clinic, over a period of one year starting from June 2015. METHODOLOGY: A total of 43 eyes of 43 patients, having mild to moderate myopic refractive error, were enrolled in the study...
January 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29283672/measurement-of-the-retention-time-of-different-ophthalmic-formulations-with-ultrahigh-resolution-optical-coherence-tomography
#18
Caterina Gagliano, Vincenzo Papa, Roberta Amato, Giulia Malaguarnera, Teresio Avitabile
Purpose/aim of the study: The purpose of this study was to measure the pre-corneal retention time of two marketed formulations (eye drops and eye gel) of a steroid-antibiotic fixed combination (FC) containing 0.1% dexamethasone and 0.3% netilmicin. MATERIALS AND METHODS: Pre-corneal retention time was evaluated in 16 healthy subjects using an ultrahigh-resolution anterior segment spectral domain optical coherence tomography (OCT). All subjects randomly received both formulations of the FC (Netildex, SIFI, Italy)...
December 28, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29283142/bilateral-idiopathic-spontaneous-filtering-bleb-with-ectopia-lentis-a-case-report-and-review-of-literature
#19
Premanand Chandran, Anjali S Khairnar, Nabeed Aboobacker, Ganesh V Raman
A 26-year-old male presented with superior filtering bleb with scleral thinning, dislocated lens, and hypotony in both the eyes. His cornea was normal without any sign of ectasia, and there was no history of recurrent redness, trauma, or surgery in either eye. Anterior segment optical coherence tomography did not reveal communicating fistula between the anterior chamber and subconjunctival space. Physical examination and blood investigations did not reveal any systemic association. He was diagnosed to have spontaneous filtering bleb, which is a rare condition observed with ocular or systemic abnormalities...
January 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29282204/surgical-removal-of-a-giant-iris-stromal-cyst-an-intraoperative-optical-coherence-tomography-guided-approach
#20
Rajesh Sinha, Manthan Hasmukhbhai Chaniyara, Jayanand Urkude, Amar Pujari
An 11-year-old girl was brought with the chief complaint of progressive diminution of vision in her right eye for the past 3 months. There was no history of ocular trauma or any ocular surgery. Systemic and family history was insignificant. Visual acuity was 20/20 in her left eye and counting finger close to face with projection of rays being accurate in her right eye. Slit lamp examination of her right eye showed large cystic lesion filling almost entire anterior chamber. With the help of various imaging modalities like anterior segment optical coherence tomography (OCT) and ultrasound biomicroscopy diagnosis of iris stromal cyst was confirmed...
December 27, 2017: BMJ Case Reports
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