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optic pit

Chi-Huan Wu, Tsung-Hsing Chen, Chen-Ming Hsu, Ming-Yao Su, Cheng-Tang Chiu, Ren-Chin Wu, Cheng-Chou Lai
INTRODUCTION: Linked-color imaging (LCI) is a recently developed system used in endoscopy. It creates clear and bright endoscopic images using short-wavelength, narrow-band laser light combined with white laser light. The illuminating light and signal processing emphasize slight color differences in abnormal regions that approximate the normal color of the mucosa. As a result, regions initially appearing red become a deeper shade of red, while regions originally appearing white become brighter, yet with natural tones...
2017: Therapeutics and Clinical Risk Management
Wadim Bowl, Silke Schweinfurth, Kerstin Holve, Knut Stieger, Birgit Lorenz, Monika Andrassi-Darida
Introduction Retinal development is a complex process that can continue into early childhood and beyond. Prematurity can affect the maturation of the central retina, characterised by a flatter foveal pit and overlying inner retinal layers (IRL), leading to a disturbed ratio of outer retinal layers to IRL ("macular developmental arrest": MDA) and functional impairment (Bowl et al. 2016 18). The purpose of this study was to correlate functional results by electrophysiology with the morphological appearance of the fovea in children with spontaneously regressed and without ROP and term-born age-matched controls...
October 2017: Klinische Monatsblätter Für Augenheilkunde
Alison Fraenkel, Lawrence R Lee, Brian Todd
No abstract text is available yet for this article.
October 9, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
Raf Bisschops, Talat Bessissow, Evelien Dekker, James E East, Adolfo Parra-Blanco, Krish Ragunath, Pradeep Bhandari, Matt Rutter, Erik Schoon, Ana Wilson, Jestinah Mahachie John, Kristel Van Steen, Filip Baert, Marc Ferrante
BACKGROUND AND AIMS: Patients with longstanding ulcerative colitis (UC) are at increased risk of developing colorectal neoplasia. Chromoendoscopy (CE) increases detection of lesions, and Kudo pit pattern classification I and II have been suggested to be predictive of benign polyps in UC. Little is known on the use of this classification in non-magnified high-definition (HD) (virtual) CE and narrow-band Imaging (NBI), or on the interobserver agreement. The aim of this pilot study was to assess the diagnostic accuracy and the interobserver agreement of the Kudo pit pattern classification in UC patients undergoing surveillance with methylene blue CE or NBI in a multicenter study...
October 3, 2017: Gastrointestinal Endoscopy
Pit Hetto, Matthias Bülhoff, Boris Sowa, Matthias C Klotz, Michael W Maier
BACKGROUND: Reverse total shoulder arthroplasty (RSA) can improve function in cuff tear arthropathy (CTA) shoulders, but limited data are available on the effect of RSA on proprioception. The purpose of this study was the evaluation of the proprioception after RSA. METHOD: This study included fifteen consecutive patients (n = 15) who received an RSA. We measured an active angle reproduction (AAR) by a novel 3D motion analysis using the Heidelberg upper extremity model (HUX)...
December 2017: Journal of Orthopaedics
Zhengren Zhang, Yang Long, Pengyu Ma, Hongqiang Li
A high-channel-count bandstop graphene plasmonic filter based on ultracompact plasmonic structure is proposed in this paper. It consists of graphene waveguide side-coupled with a series of graphene filtering units. The study shows that the waveguide-resonator system performs a multiple plasmon induced transparency (PIT) phenomenon. By carefully adjusting the Fermi level of the filtering units, any two adjacent transmitted dips which belong to different PIT units can produce coherent coupling superposition enhancement...
September 29, 2017: Nanotechnology
Marina Roizenblatt, Leo Muller, Claudio Z Lobos, Vinicius S Saraiva, Octaviano Magalhães, Andre Maia
This case report describes a 19-year-old Caucasian man presented with decreased visual acuity in the right eye for 3 months. Dilated funds exam revealed optic disk pit associated with serous macular detachment. Optical coherence tomography identified communication between the optic disk pit and the macular serous detachment, and optical coherence tomography angiography displayed a subfoveal area suggestive of subfoveal choroidal neovascularization. However, there was no evidence of leakage in the fluorescein angiogram and no evidence of choroidal neovascularization in optical coherence tomography in the area corresponding to the suspicious subfoveal choroidal neovascularization...
July 2017: Arquivos Brasileiros de Oftalmologia
Sanne M van Schuppen, Mays Talib, Arthur A Bergen, Jacoline B Ten Brink, Ralph J Florijn, Camiel J F Boon, Mary J van Schooneveld
PURPOSE: To evaluate the long-term clinical course and visual outcome of patients with choroideremia. METHODS: Clinical examination, a social questionnaire, and medical records review of 21 patients with choroideremia from 14 families. RESULTS: The mean follow-up time was 25.2 years (SD: 13.3; range 2-57 years). The mean age at symptom onset was 15.1 years (SD: 10.1; range 5-40 years). Best-corrected visual acuity was stable until the age of 35 (P = 0...
September 20, 2017: Retina
Karim Makdoumi, Torbjörn K Nilsson, Sven Crafoord
BACKGROUND: To report beta-trace protein (βTP) levels in the subretinal fluid (SRF) of four patients with a macular detachment associated with optic disc pit (ODP). METHODS: Four patients with a serous retinal detachment involving the macula was operated by pars plana vitrectomy (PPV) with C2 F6 gas tamponade and peeling of internal limiting membrane (ILM). Patients with a follow-up period exceeding one year postoperatively were included in the study. The SRF was drained using a fine cannula without laser photocoagulation, and the samples were analysed using particle-enhancing nephelometry...
September 19, 2017: Acta Ophthalmologica
Alina Oltean, Larry A Taber
During the initial stages of eye development, optic vesicles grow laterally outward from both sides of the forebrain and come into contact with the surrounding surface ectoderm (SE). Within the region of contact, these layers then thicken locally to create placodes and invaginate to form the optic cup (primitive retina) and lens vesicle (LV), respectively. This paper examines the biophysical mechanisms involved in LV formation, which consists of three phases: (1) lens placode formation; (2) invagination to create the lens pit (LP); and (3) closure to form a complete ellipsoidally shaped LV...
September 15, 2017: Physical Biology
Mingzhuo Zhao, Hongjian Li, Zhihui He, Zhiquan Chen, Hui Xu, Mingfei Zheng
We introduce a novel two-oscillator model with damping factor to describe the plasmon induced transparency (PIT) in a bright-dark model plasmonic waveguide system. The damping factor γ in the model can be calculated from metal conductor damping factor γ c and dielectric damping factor γ d . We investigate the influence of geometry parameters and damping factor γ on transmission spectra as well as slow-light effects in the plasmonic waveguide system. We can find an obvious PIT phenomenon and realize a considerable slow-light effect in the double-cavities system...
September 6, 2017: Scientific Reports
Divya Harshwardhan Jain, Kavitha Kalavani Natarajan
No abstract text is available yet for this article.
September 1, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Tao Ding, Rohit Chikkaraddy, Jan Mertens, Jeremy J Baumberg
Under UV illumination, polymer films can undergo chain scission and contract. Using this effect, tightly focused laser light is shown to develop runaway near-field concentration that drills sub-100 nm pits through a thin film. This subwavelength photolithography can be controlled in real time by monitoring laser scatter from the evolving holes, allowing systematic control of the void diameter. Our model shows how interference between the substrate and film together with near-field focusing by the evolving crevice directs this formation and predicts minimum pit sizes in films of 100 nm thickness on gold substrates...
June 21, 2017: ACS Photonics
Akshay Gopinathan Nair, Swathi Kaliki, Dilip Kumar Mishra, Milind N Naik
Optic disc pit and disc coloboma are common congenital anomalies. Both have been known to be associated with an orbital cyst. We report a case of a 6 month-old child who presented with unilateral progressive proptosis. Imaging investigations revealed a well-defined, intraconal, orbital cyst located close to the posterior surface of the globe displacing the optic nerve laterally. The cyst was excised and histopathological examination showed the cyst to have a lining of glial tissue, a thin epithelial lining, over a layer of collagenous connective tissue matrix...
July 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
Fuad Mohamad, Michael G Tanner, Debaditya Choudhury, Tushar R Choudhary, Harry A C Wood, Kerrianne Harrington, Mark Bradley
The fabrication of fluorescence-based pH sensors, embedded into etched pits of an optical fibre via highly controllable and spatially selective photo-polymerisation is described and the sensors validated.
September 25, 2017: Analyst
Marie E Roy, Leo A Whiteside, Arun M Sebastian
BACKGROUND: The degradation of ceramic femoral heads made of yttria-stabilized zirconia (Y-TZP) because of tetragonal-to-monoclinic phase transformation in vivo is well-described, whereas magnesia-stabilized zirconia (Mg-PSZ) ceramics resist phase transformation in a warm aqueous environment. The purpose of this study was to evaluate phase transformation, changes in surface topography, and roughness parameters, including changes in surface polarity and abrasiveness, among retrieved zirconia femoral heads...
July 25, 2017: Journal of Arthroplasty
Dilraj S Grewal, Daniel J Merlau, Pushpanjali Giri, Marion R Munk, Amani A Fawzi, Lee M Jampol, Angelo P Tanna
PURPOSE: To identify the risk factors for development of peripapillary retinal splitting (schisis) in patients with glaucoma or suspicion of glaucoma. SETTING: Glaucoma Clinic, Department of Ophthalmology, Northwestern University Feinberg School of Medicine, Chicago, IL. METHODS: In this institutional cross-sectional study, 495 patients (990 eyes) who had undergone spectral-domain optical coherence tomography (OCT Spectralis HRA-OCT, Heidelberg Engineering) optic nerve head (ONH) imaging and did not have identifiable optic nerve pits, pseudopits or coloboma were included...
2017: PloS One
Brijesh Takkar, Pradeep Venkatesh, Divya Agarwal, Atul Kumar
No abstract text is available yet for this article.
August 22, 2017: BMJ Case Reports
Karen W Jeng-Miller, Dean M Cestari, Eric D Gaier
PURPOSE OF REVIEW: Congenital anomalies of the optic nerve are rare but significant causes of visual dysfunction in children and adults. Accurate diagnosis is dependent on a thorough funduscopic examination, but can be enhanced by imaging information garnered from optical coherence tomography (OCT). We review common congenital optic nerve anomalies, including optic disc pit, optic nerve coloboma, morning glory disc anomaly, and hypoplasia of the optic nerve, review their systemic associations, and discuss insights from OCT imaging...
November 2017: Current Opinion in Ophthalmology
Shangjun Jiang, Netan Choudhry
Fovea plana (FP) describes the abnormal absence of the foveal pit in the retina. It is a sign that is associated with prematurity, albinism, and other ophthalmic disorders. The authors present the optical coherence tomography angiographic findings in a case of a 19-year-old male with FP and glucose-6-phosphate dehydrogenase (G6PD) deficiency. G6PD deficiency is a very common condition that typically presents with hemolytic anemia and jaundice. G6PD deficiency is also known to affect vision, but these pathologies have been less well-characterized...
August 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
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