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https://www.readbyqxmd.com/read/28738420/variation-in-the-three-dimensional-histomorphometry-of-the-normal-human-optic-nerve-head-with-age-and-race-lamina-cribrosa-and-peripapillary-scleral-thickness-and-position
#1
Christopher A Girkin, Massimo A Fazio, Hongli Yang, Juan Reynaud, Claude F Burgoyne, Brandon Smith, Lan Wang, J Crawford Downs
Purpose: This study quantified the thickness and depth of the lamina cribrosa (LC) and peripapillary scleral thickness in high-resolution three-dimensional (3D) fluorescent reconstructions of the optic nerve head (ONH) in eyes from donors of African (AD) and European descent (ED). Methods: A total of 64 eyes (45 ED, 19 AD) from 51 normal donors were obtained within 6 hours of death and fixed at 10 mm Hg of pressure. The optic nerve head was trephined from the globe and digitally reconstructed at 1...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28728177/porcine-collagen-transconjunctival-wound-closure-system-for-microincisional-vitrectomy-surgery
#2
Tiffany A Chen, Peter K Kaiser, Rainer Fasching, Darius M Moshfeghi
BACKGROUND AND OBJECTIVE: Microincisional vitrectomy surgery has improved outcomes for vitrectomies; however, wound closure complications remain an important concern. The authors introduce a technique to improve transconjunctival wound closure in vitrectomy surgery. PATIENTS AND METHODS: The authors evaluated the efficacy of porcine collagen plugs on stopping leakage from sclerotomy test sites in vitro and in vivo and assessed wound site healing with histology samples...
July 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28724961/coherence-properties-of-different-light-sources-and-their-effect-on-the-image-sharpness-and-speckle-of-holographic-displays
#3
Yuanbo Deng, Daping Chu
Coherence properties of different light sources and how they affect the image quality of holographic display are investigated. Temporal coherence is related to the intrinsic spectrum bandwidth of the light source, while spatial coherence can be affected by the size of the light source and propagation distance in use. These two coherence properties are measured for various light sources of diode-pumped solid-state (DPSS) laser, laser diode (LD), light emitting diode (LED), super luminescent light emitting diode (sLED) and micro light emitting diode (mLED) in different settings, together with the quality of the holographic reconstructed images...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722532/bi-institutional-retrospective-study-on-the-demographics-and-basic-clinical-presentation-of-hidrocystomas
#4
Michelle Maeng, Paul Petrakos, Mei Zhou, Benjamin Levine, Gary Lelli, Pete Setabutr
Hidrocystomas are benign, cystic lesions of eccrine and apocrine sweat glands. The literature on hidrocystomas is sparse, consisting of a handful of case reports and limited retrospective reviews. This is the first known bi-institutional, retrospective, chart review aimed to elucidate the demographics and basic clinical presentation of hidrocystomas. Medical records of adult patients with a pathological diagnosis of hidrocystoma from September 1, 2008 to August 1, 2015 in the Oculoplastic and Reconstructive Surgery Service at the Illinois Eye and Ear Infirmary (UIC) and Department of Ophthalmology of Weill Cornell Medical College (Cornell) were reviewed...
July 19, 2017: Orbit
https://www.readbyqxmd.com/read/28715851/paradigm-shifts-peregrinations-and-pixies-in-ophthalmology
#5
REVIEW
A O Minas Coroneo
Defending vision, our highest bandwidth sense, challenges human ingenuity. Replacing or repairing highly specialized but scarce tissue within constraints of transparency, tissue shape and alignment, tissue borders and pressure maintenance, presents special challenges. Many, mostly destructive surgical procedures, were developed prior to an understanding of underlying pathophysiology. For a number of conditions, both reconstructive and destructive procedures co-exist yet there are few guidelines as to the better approach...
July 17, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28712570/electron-microscopic-reconstruction-of-functionally-identified-cells-in-a-neural-integrator
#6
Ashwin Vishwanathan, Kayvon Daie, Alexandro D Ramirez, Jeff W Lichtman, Emre R F Aksay, H Sebastian Seung
Neural integrators are involved in a variety of sensorimotor and cognitive behaviors. The oculomotor system contains a simple example, a hindbrain neural circuit that takes velocity signals as inputs and temporally integrates them to control eye position. Here we investigated the structural underpinnings of temporal integration in the larval zebrafish by first identifying integrator neurons using two-photon calcium imaging and then reconstructing the same neurons through serial electron microscopic analysis...
July 10, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28711186/megavoltage-2d-topographic-imaging-an-attractive-alternative-to-megavoltage-ct-for-the-localization-of-breast-cancer-patients-treated-with-tomodirect
#7
Philippe Meyer, Fabien Le Pennec, Susanta K Hui, Nicolas Dehaynin, Delphine Jarnet, Matthieu Gantier, Claudine Niederst, Christophe Mazzara, Etienne Baudrier, Vincent Noblet
PURPOSE: To show the usefulness of topographic 2D megavoltage images (MV2D) for the localization of breast cancer patients treated with TomoDirect (TD), a radiotherapy treatment technique with fixed-angle beams performed on a TomoTherapy system. METHODS: A method was developed to quickly localize breast cancer patients treated with TD by registering the MV2D images produced before a TD treatment with reference images reconstructed from a kilovoltage CT simulation scanner and by using the projection of the beam-eye-view TD treatment field...
July 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28693384/eye-irritation-potential-palm-based-methyl-ester-sulphonates
#8
Nor Zuliana Yusof, Zafarizal Aldrin Azizul Hasan, Zulina Abd Maurad, Zainab Idris
Eye irritation tests are widely used to assess the ocular irritancy of chemicals. Measurement of eye irritancy is necessary for safety evaluation of both industrial and consumer products. The eye irritancy assessment of palm-based methyl ester sulphonates (MES) of different chain lengths; C12, C14, C16, C16:18 were evaluated using Top-Down approach strategy as suggested by European Centre for the Validation of Alternative Methods. The Bovine Corneal Opacity and Permeability test method (BCOP), OECD Test Guideline 437, was used as an initial step to study the inducing effect of palm-based MES on irreversible eye damage...
July 10, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28692522/reconstructive-operation-of-nonsyndromic-multiple-suture-craniosynostosis-based-on-precise-virtual-plan-and-prefabricated-template
#9
Jian Ni, Bin Yang, Binghang Li
This report presents a case of a 4-year-old girl suffering from multiple-suture nonsyndromic craniosynostosis. The patient is characterized with fronto-orbital malformation and poor visual acuity. The preoperational three-dimensional computed tomography scan showed premature closure of the sagittal suture, bilateral coronal, and lambdoidal suture. The virtual surgical planning was performed before operation for the reposition of bone segments and communication with the patient's family. The navigational plate for reshaping was made based on the surgical plan with three-dimensional printed model...
July 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28691238/structure-and-ultrastructure-of-eyes-and-brains-of-thalia-democratica-thaliacea-tunicata-chordata
#10
Katrin Braun, Thomas Stach
Salps are marine planktonic chordates that possess an obligatory alternation of reproductive modes in subsequent generations. Within tunicates, salps represent a derived life cycle and are of interest in considerations of the evolutionary origin of complex anatomical structures and life history strategies. In the present study, the eyes and brains of both the sexual, aggregate blastozooid and the asexual, solitary oozooid stage of Thalia democratica (Forskål, ) were digitally reconstructed in detail based on serial sectioning for light and transmission electron microscopy...
July 10, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28690224/-autologous-tissue-reconstruction-of-tarsal-plate-combined-with-temporal-flap-in-repairing-full-thickness-lower-eyelid-defect
#11
Ming Li, Shaoqian Liu, Nian Chen, Feijiao Duan, Hongju Xie
To evaluate the clinical effect of combination of autologous tissue reconstruction of tarsal plate with temporal flap on repair of full-thickness lower eyelid defect. 
 Methods: Eleven patients (11 eyes) underwent hard palate mucosa or ear cartilage combined the emporal flap with the orbicularis oculi muscle to repair full-thickness defect of palpebra inferior. Of the 11 patients, 6 had more than 75% eyelid defect area, and 5 had more than 50% eyelid defect area. 
 Results: All 11 eyes closed completely, with no entropion or ectropion, and returned to normal basically...
June 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28678820/effect-of-reduced-z-axis-scan-coverage-on-diagnostic-performance-and-radiation-dose-of-neck-computed-tomography-in-patients-with-suspected-cervical-abscess
#12
Jakob Weiss, Michael Maurer, Dominik Ketelsen, Mike Notohamiprodjo, Dominik Zinsser, Julian L Wichmann, Konstantin Nikolaou, Fabian Bamberg, Ahmed E Othman
PURPOSE: To evaluate the effect of reduced z-axis scan coverage on diagnostic performance and radiation dose of neck CT in patients with suspected cervical abscess. METHODS: Fifty-one patients with suspected cervical abscess were included and underwent contrast-enhanced neck CT on a 2nd or 3rd generation dual-source CT system. Image acquisition ranged from the aortic arch to the upper roof of the frontal sinuses (CTstd). Subsequently, series with reduced z-axis coverage (CTred) were reconstructed starting at the aortic arch up to the orbital floor...
2017: PloS One
https://www.readbyqxmd.com/read/28677833/vitrectomy-with-a-modified-temporal-inverted-limiting-membrane-flap-to-reconstruct-the-foveolar-architecture-for-macular-hole-retinal-detachment-in-highly-myopic-eyes
#13
Tzyy-Chang Ho, Allen Ho, Muh-Shy Chen
PURPOSE: We investigated the surgical results of macular hole retinal detachment (MHRD) with a modified C-shaped temporal inverted internal limiting membrane (ILM) flap to reconstruct the foveolar architecture in highly myopic eyes. METHODS: Eighteen highly myopic eyes with MHRD in 17 patients who underwent a vitrectomy with a modified C-shaped temporal inverted ILM flap were followed for 12 months. Anatomic outcomes were evaluated by fundus examinations and optical coherence tomography...
July 5, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28674650/an-adaptive-singular-spectrum-analysis-method-for-extracting-brain-rhythms-of-electroencephalography
#14
Hai Hu, Shengxin Guo, Ran Liu, Peng Wang
Artifacts removal and rhythms extraction from electroencephalography (EEG) signals are important for portable and wearable EEG recording devices. Incorporating a novel grouping rule, we proposed an adaptive singular spectrum analysis (SSA) method for artifacts removal and rhythms extraction. Based on the EEG signal amplitude, the grouping rule determines adaptively the first one or two SSA reconstructed components as artifacts and removes them. The remaining reconstructed components are then grouped based on their peak frequencies in the Fourier transform to extract the desired rhythms...
2017: PeerJ
https://www.readbyqxmd.com/read/28669780/impact-of-normal-aging-and-progression-definitions-on-the-specificity-of-detecting-retinal-nerve-fiber-layer-thinning
#15
Zhichao Wu, Luke J Saunders, Linda M Zangwill, Fábio B Daga, Jonathan G Crowston, Felipe A Medeiros
PURPOSE: To evaluate the specificity of current definitions used to identify progressive change of the average peripapillary retinal nerve fiber layer (RNFL) thickness measurements obtained on optical coherence tomography (OCT) imaging. DESIGN: Prospective observational cohort study METHODS: Setting: University of California, San Diego. STUDY POPULATION: 75 eyes from 45 normal participants. OBSERVATION PROCEDURE: Patients were seen at an average of 5...
June 29, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28666523/reconstruction-techniques-of-choice-for-the-facial-cosmetic-units
#16
F Russo, M Linares, M E Iglesias, J L Martínez-Amo, F Cabo, J Tercedor, R Costa-Vieira, T Toledo-Pastrana, J M Ródenas, V Leis
BACKGROUND AND OBJECTIVES: A broad range of skin flaps can be used to repair facial surgical defects after the excision of a tumor. The aim of our study was to develop a practical guideline covering the most useful skin grafts for each of the distinct facial cosmetic units. MATERIAL AND METHODS: This was a multicenter study in which 10 dermatologists with extensive experience in reconstructive surgery chose their preferred technique for each cosmetic unit. The choice of flaps was based on personal experience, taking into account factors such as suitability of the reconstruction technique for the specific defect, the final cosmetic result, surgical difficulty, and risk of complications...
June 27, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/28665475/autologous-cultivated-limbal-stem-cell-transplantation-after-failed-previous-limbal-graft
#17
Karl A Knutsson, Stanislav Matuska, Paolo Rama
PURPOSE: To describe a case of unilateral limbal stem cell deficiency (LSCD) with previously failed autologous graft, resolved by ocular surface reconstruction using cultured autologous limbal stem cells from the contralateral eye. CASE REPORT: A 35-year-old patient presented to our clinic with LSCD due to a unilateral alkali burn. The patient had received a previous limbal graft from the contralateral eye that had failed to impede corneal conjunctivalization. We decided to repeat limbal stem cell transplantation using an ex vivo cultivation procedure to reduce the risk of tissue harvesting on the healthy fellow eye...
June 20, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28663845/reduction-of-frame-rate-in-full-field-swept-source-optical-coherence-tomography-by-numerical-motion-correction-invited
#18
Clara Pfäffle, Hendrik Spahr, Dierck Hillmann, Helge Sudkamp, Gesa Franke, Peter Koch, Gereon Hüttmann
Full-field swept-source optical coherence tomography (FF-SS-OCT) was recently shown to allow new and exciting applications for imaging the human eye that were previously not possible using current scanning OCT systems. However, especially when using cameras that do not acquire data with hundreds of kHz frame rate, uncorrected phase errors due to axial motion of the eye lead to a drastic loss in image quality of the reconstructed volumes. Here we first give a short overview of recent advances in techniques and applications of parallelized OCT and finally present an iterative and statistical algorithm that estimates and corrects motion-induced phase errors in the FF-SS-OCT data...
March 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28663726/neural-cross-frequency-coupling-functions
#19
Tomislav Stankovski, Valentina Ticcinelli, Peter V E McClintock, Aneta Stefanovska
Although neural interactions are usually characterized only by their coupling strength and directionality, there is often a need to go beyond this by establishing the functional mechanisms of the interaction. We introduce the use of dynamical Bayesian inference for estimation of the coupling functions of neural oscillations in the presence of noise. By grouping the partial functional contributions, the coupling is decomposed into its functional components and its most important characteristics-strength and form-are quantified...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28660079/umbilical-cord-patch-transplantation-for-corneal-perforations-and-descemetoceles
#20
Hua-Tao Xie, Dan Zhao, Yang Liu, Ming-Chang Zhang
PURPOSE: To evaluate the clinical outcome of umbilical cord patch (UCP) transplantation for deep corneal ulcers with perforations and descemetoceles. METHODS: In this retrospective, noncomparative, interventional case series, 11 eyes of 11 patients with corneal perforation or descemetocele were included. The thickness and microstructure of UCP were measured. All eyes were treated with UCP and amniotic membrane transplantation for corneal reconstruction. Corneal ulcer healing, corneal thickness, anterior chamber formation, and best-corrected visual acuity (BCVA) were recorded and analyzed...
2017: Journal of Ophthalmology
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