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optic pit

David H W Steel, Javid Suleman, Declan C Murphy, Anna Song, Steve Dodds, Jon Rees
PURPOSE: To identify the incidence, presenting features, treatment, and clinical course of optic disc pit maculopathy (ODPM) in the United Kingdom (UK). DESIGN: A 2-year nationwide prospective population-based study. SUBJECTS: All new incident cases of ODPM presenting to UK ophthalmologists using the British Ophthalmic Surveillance Unit monthly reporting system. METHODS: All reporting ophthalmologists were sent an initial questionnaire requesting data on previous medical and ophthalmic history, presentation details, investigation findings, and management...
June 7, 2018: Ophthalmology
Jinbo Hu, Yang Shi, Yuan Liu, Shanshan Chang
The main product of Camellia oleifera is edible oil made from the seeds, but huge quantities of agro-waste are produced in the form of shells. The primary components of C. oleifera fruit shell are cellulose, hemicellulose, and lignin, which probably make it a good eco-friendly non-wood material. Understanding the structure of the shell is however a prerequisite to making full use of it. The anatomical structure of C. oleifera fruit shells was investigated from macroscopic to ultrastructural scale by stereoscopic, optical, and scanning electron microscopy...
June 4, 2018: Protoplasma
Zhaojian Zhang, Junbo Yang, Xin He, Yunxin Han, Jingjing Zhang, Jie Huang, Dingbo Chen, Siyu Xu
As a plasmonic analogue of electromagnetically induced transparency (EIT), plasmon-induced transparency (PIT) has drawn more attention due to its potential of realizing on-chip sensing, slow light and nonlinear effect enhancement. However, the performance of a plasmonic system is always limited by the metal ohmic loss. Here, we numerically report a PIT system with gain materials based on plasmonic metal-insulator-metal waveguide. The corresponding phenomenon can be theoretically analyzed by coupled mode theory (CMT)...
June 3, 2018: Materials
Vahid A Hosseini, Leif Karlsson, Sten Wessman, Nuria Fuertes
Sigma phase is commonly considered to be the most deleterious secondary phase precipitating in duplex stainless steels, as it results in an extreme reduction of corrosion resistance and toughness. Previous studies have mainly focused on the kinetics of sigma phase precipitation and influences on properties and only a few works have studied the morphology of sigma phase and its influences on material properties. Therefore, the influence of sigma phase morphology on the degradation of corrosion resistance and mechanical properties of 2507 super duplex stainless steel (SDSS) was studied after 10 h of arc heat treatment using optical and scanning electron microscopy, electron backscattered diffraction analysis, corrosion testing, and thermodynamic calculations...
June 1, 2018: Materials
Carlos Andrés Valdés-Lara, Nicolás Crim, Gerardo García-Aguirre, Ismael Ávila Lule, Virgilio Morales-Cantón
Purpose: Optic disc pits (ODP) are rare and congenital anomalies of the optic disc, sometimes remaining asymptomatic. However, serous macular detachment or optic disc maculopathy is the most common complication, causing significant visual deterioration, without a current consensus about treatment. We describe a case of ODP maculopathy that was treated successfully with micropulse laser. Observations: A patient with ODP maculopathy remained with macular serous detachment after nine months of follow up after pars plana vitrectomy...
June 2018: American Journal of Ophthalmology Case Reports
Shuang Mei, Yudan Wang, Guojun Wen, Yang Hu
Increasing deployment of optical fiber networks and the need for reliable high bandwidth make the task of inspecting optical fiber connector end faces a crucial process that must not be neglected. Traditional end face inspections are usually performed by manual visual methods, which are low in efficiency and poor in precision for long-term industrial applications. More seriously, the inspection results cannot be quantified for subsequent analysis. Aiming at the characteristics of typical defects in the inspection process for optical fiber end faces, we propose a novel method, “difference of min-max ranking filtering” (DO2MR), for detection of region-based defects, e...
May 3, 2018: Sensors
David F Patterson, Mai-Lan Ho, Jacqueline A Leavitt, Nathan J Smischney, Sara E Hocker, Eelco F Wijdicks, David O Hodge, John Jing-Wei Chen
Background/aims: To evaluate and compare the performance of ocular ultrasonography (US) and magnetic resonance imaging (MRI) for detecting increased intracranial pressure (ICP) in patients with idiopathic intracranial hypertension (IIH). Methods: Twenty-two patients with papilledema from IIH and 22 with pseudopapilledema were prospectively recruited based on funduscopic and clinical findings. Measurements of optic nerve sheath diameters (ONSDs) 3 mm behind the inner sclera were performed on B-scan US and axial T2-weighted MRI examinations...
2018: Frontiers in Neurology
Long Fan, Jia Li, Dawei Yan, Liping Peng, Tao Jiang, Xueming Wang, Weidong Wu
A chemical vapor transport (CVT) method was implemented to grow bulk ZnO crystals. X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), and optical microscope (OM) studies were carried out to characterize the surface properties of the grown crystal. The XRD result indicated the exposed solid-vapor interface of the as-grown crystal was composed of (0001) and [Formula: see text] faces. Using SEM and OM, we observed small hexagonal pyramids and microstructures formed of crosslines on the as-grown crystal and found hexagonal thermal etching pits on the surfaces of seed crystals...
2018: Scanning
Kumar Saurabh, Rupak Roy, Dhaivat Shah, Subham Sinha Roy
No abstract text is available yet for this article.
April 27, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
Tadanobu Nagaya, Shuhei Okuyama, Fusa Ogata, Yasuhiro Maruoka, Peter L Choyke, Hisataka Kobayashi
Near infrared photoimmunotherapy (NIR-PIT) is a highly selective tumor treatment that employs an antibody-photo-absorber conjugate (APC) which is activated by near infrared light. Here, we describe the efficacy of endoscopic NIR-PIT using the APC trastuzumab-IR700DX (tra-IR700) in the setting of human epidermal growth factor 2 positive (HER2 + ) gastric carcinoma with peritoneal disseminations. In this in vivo study, fluorescence endoscopy showed high tumor accumulation of tra-IR700 within disseminated peritoneal implants...
June 2018: Cancer Science
Qinggong Tang, Tadanobu Nagaya, Yi Liu, Hannah Horng, Jonathan Lin, Kazuhide Sato, Hisataka Kobayashi, Yu Chen
As a novel low-side-effect cancer therapy, photo-immunotherapy (PIT) is based on conjugating monoclonal antibody (mAb) with a near-infrared (NIR) phthalocyanine dye IRDye700DX (IR 700). IR700 is not only fluorescent to be used as an imaging agent, but also phototoxic. When illuminating with NIR light, PIT can induce highly-selective cancer cell death while leaving most of tumor blood vessels unharmed, leading to an effect termed super-enhanced permeability and retention (SUPR), which can significantly improve the effectiveness of anti-cancer drug...
June 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
Roland Tolulope Loto
Inhibition effect of trypsin complex (TC) on the pitting corrosion of martensitic stainless steel (type 420) in 1M H2SO4 solution was studied with potentiodynamic polarization, open circuit potential measurement and optical microscopy. TC reduced the corrosion rate of the steel with maximum inhibition efficiency of 80.75%. Corrosion potential shifted anodically due to the electrochemical action of TC. The pitting potential increased from 1.088VAg/AgCl (3M) at 0% TC to 1.365VAg/AgCl(3M) at 4% TC. TC shifts the open circuit corrosion potential from -0...
2018: PloS One
Dongfeng Qi, Shiwei Tang, Letian Wang, Shixun Dai, Xiang Shen, Chen Wang, Songyan Chen
Optically electric- and magnetic resonance-induced dielectric nanostructures have garnered significant attention due to applications as tunable electronic and optoelectronic device. In this letter, we describe an ultrafast and large-area method to construct symmetrical and single-crystal Si island structures directly on Si substrates by a pulse laser dewetting method. The tunable surface electric field intensity distribution could convert the stochastic dewetting process into a deterministic process (classical dipole mode and Mie resonance dipole mode) on predefined Si pit arrays via laser dewetting...
May 3, 2018: Nanoscale
Christian B Poulsen, Ryan M Pedrigi, Nilesh Pareek, Ismail D Kilic, Niels Ramsing Holm, Jacob F Bentzon, Hans Erik Bøtker, Erling Falk, Rob Krams, Ranil de Silva
AIMS: In-vivo validation of coronary optical coherence tomography (OCT) against histology and the effects of plaque burden (PB) on plaque classification remain unreported. We investigated this in a porcine model with human-like coronary atherosclerosis. METHODS AND RESULTS: Five female Yucatan D374Y-PCSK9 transgenic hypercholesterolemic mini-pigs were implanted with a coronary shear-modifying stent to induce advanced atherosclerosis. OCT frames (n=201) were obtained 34 weeks after implantation...
April 3, 2018: EuroIntervention
Andreas Bringmann, Steffen Syrbe, Katja Görner, Johannes Kacza, Mike Francke, Peter Wiedemann, Andreas Reichenbach
A fovea is a pitted invagination in the inner retinal tissue (fovea interna) that overlies an area of photoreceptors specialized for high acuity vision (fovea externa). Although the shape of the vertebrate fovea varies considerably among the species, there are two basic types. The retina of many predatory fish, reptilians, and birds possess one (or two) convexiclivate fovea(s), while the retina of higher primates contains a concaviclivate fovea. By refraction of the incoming light, the convexiclivate fovea may function as image enlarger, focus indicator, and movement detector...
March 30, 2018: Progress in Retinal and Eye Research
Shikha Talwar Bassi, Ronnie George, Swarnali Sen, Rashima Asokan, Vijaya Lingam
PURPOSE: To determine the prevalence of congenitally abnormal disc (all anomalies) in an adult population in southern India. METHODS: Subjects aged ≥40 years (n=6013) underwent a complete ophthalmic examination. Optic disc anomalies were diagnosed according to the definitions given in the article. RESULTS: Optic disc anomalies were found in 81 eyes of 66 (1.1%, 95% CIs 0.00834 to 0.01361) patients. The prevalence of each anomaly in the descending order was peripapillary myelinated nerve fibre (0...
March 22, 2018: British Journal of Ophthalmology
Richard Lord, Nicholas E Burr, Noor Mohammed, Venkataraman Subramanian
AIM: To perform a systematic review and meta-analysis for the diagnostic accuracy of in vivo lesion characterization in colonic inflammatory bowel disease (IBD), using optical imaging techniques, including virtual chromoendoscopy (VCE), dye-based chromoendoscopy (DBC), magnification endoscopy and confocal laser endomicroscopy (CLE). METHODS: We searched Medline, Embase and the Cochrane library. We performed a bivariate meta-analysis to calculate the pooled estimate sensitivities, specificities, positive and negative likelihood ratios (+LHR, -LHR), diagnostic odds ratios (DOR), and area under the SROC curve (AUSROC) for each technology group...
March 14, 2018: World Journal of Gastroenterology: WJG
Shuhei Okuyama, Tadanobu Nagaya, Kazuhide Sato, Fusa Ogata, Yasuhiro Maruoka, Peter L Choyke, Hisataka Kobayashi
Near-infrared photoimmunotherapy (NIR-PIT), a promising cancer therapy utilizing an antibody-photoabsorber conjugate (APC) and NIR light, which induces rapid necrotic cell death only in APC-bound cells. Effective NIR-PIT in mouse models has been achieved using superficial light illumination (SLI) with light emitting diodes (LEDs) or lasers, but in the clinical setting, fiber optic diffusers have been employed to deliver light to deeper tumors. However, the performance of NIR light in tissue delivered by fiber optic diffusers is poorly understood...
February 16, 2018: Oncotarget
Ovidiu Musat, Stella Ioana Popescu, Corina Cristina Cernat, Ana Maria Boariu, Lucian Alexandru
This paper discusses a 32-year-old woman's case who presented a chronic decrease of visual acuity. In this case, the treatment was complex and consisted of a 25 GA vitrectomy, MLI peeling, covering the defect at the optic nerve papilla with that patch, gas endotamponade (C3F8). Abbreviations: MLI = internal limiting membrane; ODP-M = optic disc pit maculopathy.
October 2017: Romanian Journal of Ophthalmology
Giancarlo Sborgia, Nicola Recchimurzo, Luigi Sborgia, Alfredo Niro, Alessandra Sborgia, Marina Piepoli, Giovanni Alessio
PURPOSE: To analyze morphologic and functional changes after inverted internal limiting membrane-flap technique for optic disk pit maculopathy using optical coherence tomography, multifocal electroretinography, and microperimetry. METHODS: One case report. RESULTS: A 30-year-old woman presented us with decreased visual acuity (20/63) in the left eye because of retinoschisis and serous macular detachment associated with optic disk pit. Optical coherence tomography did not localize the source of intraretinal and subretinal fluid...
February 22, 2018: Retinal Cases & Brief Reports
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