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https://www.readbyqxmd.com/read/27887794/retinoschisis-and-neurosensory-detachment-in-advanced-focal-glaucoma
#1
E Arranz-Márquez, E Jarrín Hernández, A Pastor, J García Gil de Bernabé
CLINICAL CASE: A 71-year-old woman with normotensive primary open-angle glaucoma presented with an asymptomatic temporal peripapillary retinoschisis, associated with serous retinal detachment in the eye with the more advanced glaucoma. It was located at the inferior pole of the optic disc, in the proximity of a glaucomatous focal disc defect. DISCUSSION: Although congenital optic pits are strongly related with juxta-papillary retinoschisis, retinoschisis can also arise from acquired defects in the proximity of glaucomatous optic discs...
November 22, 2016: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/27872777/optic-disk-pit-with-sudden-central-visual-field-scotoma
#2
Nikol Panou, Demetrios G Vavvas
Purpose. To describe a case of optic disk pit (ODP) with sudden central visual field scotoma. Methods. A 49-year-old woman presented, reporting sudden painless central visual field loss 3 months prior to presentation. Neuroophthalmologic, systematic, and laboratory evaluation and full imaging processes were performed. Results. Fundoscopy and color photography demonstrated an optic disk pit inferotemporally. Perimetry identified central visual field horizontal scotoma. OCT revealed absence of serous retinal detachment, but disclosed inner retina thinning corresponding to the area of the visual field loss...
2016: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/27857356/transformation-from-plasmon-induced-transparence-to-induced-absorption-through-the-control-of-coupling-strength-in-metal-insulator-metal-structure
#3
Yoichiro Neo, Takahiro Matsumoto, Takeshi Watanabe, Makoto Tomita, Hidenori Mimura
Photonic structures created by coupling a narrow resonance to a broad resonance can significantly improve the sensitivity of optical sensors. We investigated a planar metal-insulator-metal (MIM) multilayered structure using attenuated total reflection to couple surface plasmon polaritons with the waveguide (WG) mode. A plasmon-induced transparency (PIT) to plasmon-induced adsorption (PIA) transformation was realized by controlling the coupling strength between the incident light and the WG mode. The results indicated that PIT and PIA have differing coupling strength and reflectance phase at surface plasmon resonance...
November 14, 2016: Optics Express
https://www.readbyqxmd.com/read/27856284/multiwavelength-micromirrors-in-the-cuticle-of-scarab-beetle-chrysina-gloriosa
#4
Gonzague Agez, Chloé Bayon, Michel Mitov
: Beetles from the genus Chrysina show vivid reflections from bright green to metallic silver-gold as a consequence of the cholesteric liquid crystal organization of chitin molecules. Particularly, the cuticle of Chrysina gloriosa exhibits green and silver stripes. By combining confocal microscopy and spectrophotometry, scanning electron microscopy and numerical simulations, the relationship between the reflectance and the structural parameters for both stripes at the micro- and nanoscales are established...
November 14, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27835817/rapid-microwave-assisted-synthesis-of-sub-30nm-lipid-nanoparticles
#5
Stuart S Dunn, Denis R Beckford Vera, S Rahima Benhabbour, Matthew C Parrott
HYPOTHESIS: Accessing the phase inversion temperature by microwave heating may enable the rapid synthesis of small lipid nanoparticles. EXPERIMENTS: Nanoparticle formulations consisted of surfactants Brij 78 and Vitamin E TPGS, and trilaurin, trimyristin, or miglyol 812 as nanoparticle lipid cores. Each formulation was placed in water and heated by microwave irradiation at temperatures ranging from 65°C to 245°C. We observed a phase inversion temperature (PIT) for these formulations based on a dramatic decrease in particle Z-average diameters...
February 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27834967/peripapillary-schisis-in-open-angle-glaucoma
#6
N Dhingra, R Manoharan, S Gill, M Nagar
PurposeTo report clinical features, topographic findings and outcome of 10 eyes with peripapillary schisis in open-angle glaucoma.Patients and methodsA retrospective review of patients with open-angle glaucoma who were noted to have peripapillary schisis on optical coherence tomography (OCT) were included. Serial peripapillary and macula infrared and OCT images, visual acuity, visual fields, and schisis appearance were reviewed.ResultsTen eyes of nine patients with open-angle glaucoma were detected to have the presence of peripapillary schisis...
November 11, 2016: Eye
https://www.readbyqxmd.com/read/27790770/a-sloped-piecemeal-gaussian-model-for-characterising-foveal-pit-shape
#7
Lei Liu, Wendy Marsh-Tootle, Elise N Harb, Wei Hou, Qinghua Zhang, Heather A Anderson, Thomas T Norton, Katherine K Weise, Jane E Gwiazda, Leslie Hyman
PURPOSE: High-quality optical coherence tomography (OCT) macular scans make it possible to distinguish a range of normal and diseased states by characterising foveal pit shape. Existing mathematical models lack the flexibility to capture all known pit variations and thus characterise the pit with limited accuracy. This study aimed to develop a new model that provides a more robust characterisation of individual foveal pit variations. METHODS: A Sloped Piecemeal Gaussian (SPG) model, consisting of a linear combination of a tilted line and a piecemeal Gaussian function (two halves of a Gaussian connected by a separate straight line), was developed to fit retinal thickness data with the flexibility to characterise different degrees of pit asymmetry and pit bottom flatness...
November 2016: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27790568/comparative-evaluation-of-the-marginal-sealing-ability-of-two-commercially-available-pit-and-fissure-sealants
#8
Lakshmi Priya Sridhar, Joyson Moses, Bollam Nammalwar Rangeeth, Subramanian Sivakumar
INTRODUCTION: The occlusal surfaces of the teeth usually have pits and fissures which provide a good environment for demineralization with minimal salivary access and make them caries prone. The success of pit and fissure sealing materials is highly dependent on the marginal sealing ability of the fissures. AIM: The present study was carried out to evaluate and compare the marginal sealing ability of two commercially available pit and fissure sealants. MATERIALS AND METHODS: A total of 50 human premolar teeth were used in this invitro study...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27785487/composition-variation-in-al-based-dilute-nitride-alloys-using-apertureless-scanning-near-field-optical-microscopy
#9
G Kolhatkar, A Boucherif, C Dab, S Fafard, V Aimez, R Arès, A Ruediger
We use apertureless scanning near-field optical microscopy to study the phase separation in chemical beam epitaxy grown Al0.1Ga0.9NxAs1-x alloys. Pits attributed to nitrogen-clustering observed on the Al0.1Ga0.9NxAs1-x surface grown at 420 °C become larger at higher growth temperatures, and 3D islands appear on the surface at 565 °C. Atomic force microscopy phase measurements reveal a composition difference between the islands and the pits, whereas the sample grown at 420 °C appears to be homogeneous. Confocal Raman spectra show that all the N atoms are bonded to Al instead of Ga...
October 27, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27750285/in-vivo-morphology-of-the-optic-nerve-and-retina-in-patients-with-parkinson-s-disease
#10
Anastasia Pilat, Rebecca J McLean, Frank A Proudlock, Gail D E Maconachie, Viral Sheth, Yusuf A Rajabally, Irene Gottlob
Purpose: To investigate optic nerve (ON) and macular morphology in patients with Parkinson's disease (PD) using spectral-domain optical coherence tomography (SD-OCT). Subjects: Twenty-five participants with PD (19 males and 6 females; mean age 60.79; SD ± 9.24) and 25 sex-, age-, ethnicity-, and refraction-matched healthy controls. Methods: A high-resolution SD-OCT device was used to acquire scans in 25 participants with PD (mean age 60.79; ± SD 9...
August 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27747120/full-thickness-macular-hole-formation-after-internal-limiting-membrane-peeling-beware-the-omega-sign
#11
Robert A Sisk, Okan Toygar
Purpose. To introduce a clinical sign on spectral domain optical coherence tomography (SDOCT), which may indicate high risk for full-thickness macular hole formation after internal limiting membrane (ILM) peeling. Methods. The preoperative SDOCT images of two patients-one with multilaminar hemorrhage from ruptured retinal artery macroaneurysm and one with serous retinal detachment and severe macular schisis from optic pit maculopathy-who developed full-thickness macular hole (FTMH) after ILM peeling were evaluated retrospectively...
2016: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/27711004/unusual-case-of-stellate-nonhereditary-idiopathic-foveomacular-retinoschisis
#12
Rosa Dolz-Marco, Kenneth Kato, K Bailey Freund, Lawrence A Yannuzzi
PURPOSE: To report a case of unilateral stellate nonhereditary idiopathic foveomacular retinoschisis (SNIFR) in a young male showing structural changes induced by a Valsalva maneuver. METHODS: Case report of a 26-year-old oboist with SNIFR, including multimodal imaging. Eye-tracked spectral-domain optical coherence tomography (SD-OCT) was used to compare the retinal architecture at rest and during a Valsalva maneuver. RESULTS: Spectral-domain optical coherence tomography showed macular and peripapillary retinoschisis with no signs of pathologic myopia, optic pit, or vitreoretinal traction...
August 23, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27662409/swept-source-optical-coherence-tomography-validates-lamina-cribrosa-anomaly-in-optic-disk-pit
#13
Kumar Sambhav, Sandeep Grover, K V Chalam
PURPOSE: Swept Source Optical Coherence Tomography validates lamina cribrosa anomaly in optic disk pit. METHOD: Observational case report. RESULTS: A 25-year-old African American male presented with decreased vision in right eye of 4 days duration. Best corrected visual acuity (BCVA) for distance in right eye was 20/200 and in left eye was 20/20. Dilated fundus examination of right eye showed serous macular detachment of entire posterior pole along with an optic pit on temporal margin of optic disk...
September 22, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27648324/a-rare-case-of-symptomatic-double-optic-disc-pit-without-maculopathy
#14
Zaria Ali, Mohammad Abdul-Nabi
Optic disc pits are an uncommon congenital abnormality. Patients remain asymptomatic unless they develop maculopathy. We present a rare case of a double optic disc pit of which only three others have been reported worldwide. A 51-year-old gentleman presented with blurred vision. Fundoscopy revealed a right double optic disc pit. Though he was symptomatic there was no evidence of maculopathy. OCT of macula and disc was otherwise unremarkable. Visual field demonstrated a paracentral defect. Although optic disc pits are rare they are still an important clinical entity...
2016: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/27632584/a-rescue-therapy-for-persistent-optic-disk-pit-maculopathy-in-previously-vitrectomized-eyes
#15
Marta S Figueroa, Jeroni Nadal, Inés Contreras
PURPOSE: To report the results of vitrectomy with platelet-rich plasma (PRP) application and gas tamponade as a rescue therapy in previously vitrectomized eyes with optic disk pit (ODP) maculopathy. METHODS: Three patients with visual loss due to persistent or recurrent ODP maculopathy who had undergone previous vitrectomy were offered application of PRP. Platelet-rich plasma was obtained by centrifugation of a blood sample from each patient. Surgery consisted of vitrectomy and internal limiting membrane peeling if the membrane had not been already removed (in two eyes)...
September 14, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27617535/intrapapillary-proliferation-in-optic-disk-pits-clinical-findings-and-time-related-changes
#16
Josef Maertz, Kathrin J Mohler, Jan P Kolb, Thomas Kein, Aljoscha Neubauer, Anselm Kampik, Siegfried Priglinger, Wolfgang Wieser, Robert Huber, Armin Wolf
PURPOSE: To investigate the structural changes of intrapapillary proliferations associated with optic disk pits (ODPs) and optic disk pit maculopathy (ODP-M) using enhanced depth-spectral domain-optical coherence tomography (SD-EDI-OCT) and megahertz optical coherence tomography (MHz-OCT). METHODS: Sixteen eyes of patients with ODPs were studied. Papillary and peripapillary areas were repeatedly examined with SD-EDI-OCT over time. To evaluate swept-source OCT, some of the patients additionally received MHz-OCT-imaging...
September 9, 2016: Retina
https://www.readbyqxmd.com/read/27614461/the-results-of-25-gauge-vitreoretinal-surgery-for-optic-disc-pit-associated-maculopathy-a-report-of-three-cases-and-mini-review-of-the-literature
#17
Alper Mete, Peykan Türkçüoğlu, Sabit Kimyon, Kıvanç Güngör
PURPOSE: We report the outcomes of three consecutive patients with optic disc pit-associated maculopathy who were treated with 25-gauge pars plana vitrectomy, internal limiting membrane (ILM) peeling, fluid-air exchange, barrage endolaser, and sulfur hexafluoride (SF6) gas tamponade. CASE REPORT: Patients with optic disc pit-associated maculopathy were treated with 25-gauge pars plana vitrectomy followed by ILM peeling, fluid-air exchange, barrage endolaser, and gas tamponade with 20 % SF6...
September 10, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27612488/real-life-chromoendoscopy-for-neoplasia-detection-and-characterisation-in-long-standing-ibd
#18
Sabela Carballal, Sandra Maisterra, Antonio López-Serrano, Antonio Z Gimeno-García, María Isabel Vera, José Carlos Marín-Garbriel, José Díaz-Tasende, Lucía Márquez, Marco Antonio Álvarez, Luis Hernández, Luisa De Castro, Jordi Gordillo, Ignasi Puig, Pablo Vega, Marco Bustamante-Balén, Juan Acevedo, Beatriz Peñas, María López-Cerón, Elena Ricart, Miriam Cuatrecasas, Mireya Jimeno, María Pellisé
OBJECTIVE: Outside clinical trials, the effectiveness of chromoendoscopy (CE) for long-standing IBD surveillance is controversial. We aimed to assess the effectiveness of CE for neoplasia detection and characterisation, in real-life. DESIGN: From June 2012 to 2014, patients with IBD were prospectively included in a multicentre cohort study. Each colonic segment was evaluated with white light followed by 0.4% indigo carmine CE. Specific lesions' features were recorded...
September 9, 2016: Gut
https://www.readbyqxmd.com/read/27604845/multispectral-plasmon-induced-transparency-in-hyperfine-terahertz-meta-molecules
#19
Shengyan Yang, Xiaoxiang Xia, Zhe Liu, E Yiwen, Yujin Wang, Chengchun Tang, Wuxia Li, Junjie Li, Li Wang, Changzhi Gu
We experimentally and theoretically demonstrated an approach to achieve multispectral plasmon-induced transparency (PIT) by utilizing meta-molecules that consist of hyperfine terahertz meta-atoms. The feature size of such hyperfine meta-atoms is 400 nm, which is one order smaller than that of normal terahertz metamaterials. The hyperfine meta-atoms with close eigenfrequencies and narrow resonant responses introduce different metastable energy levels, which makes the multispectral PIT possible. In the triple PIT system, the slow light effect is further confirmed as the effective group delay at three transmission windows can reach 7...
November 9, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/27579729/long-term-outcomes-of-radial-optic-neurotomy-for-management-of-optic-disk-pit-maculopathy
#20
Murat Karacorlu, Isil Sayman Muslubas, Mumin Hocaoglu, Hakan Ozdemir, Serra Arf, Omer Uysal
PURPOSE: To evaluate the long-term outcomes of radial optic neurotomy (RON) in patients with optic disk pit maculopathy and to compare the functional and anatomical outcomes of pars plana vitrectomy (PPV) with temporal side single RON versus PPV without RON. METHODS: This retrospective study included 15 eyes of 15 consecutive patients who had surgery for optic disk pit maculopathy. Patients were followed for 12 to 115 months after surgery. Anatomical and functional results were evaluated with optical coherence tomography, MP-1 microperimetry in the central 20°, and measurement of best-corrected visual acuity...
December 2016: Retina
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