keyword
MENU ▼
Read by QxMD icon Read
search

eye reconstruction

keyword
https://www.readbyqxmd.com/read/28211877/fresh-frozen-amniotic-membrane-for-conjunctival-reconstruction-after-excision-of-neoplastic-and-presumed-neoplastic-conjunctival-lesions
#1
U Agraval, P Rundle, I G Rennie, S Salvi
PurposeSuspicious neoplastic conjunctival lesions often require wide excision with tumour-free margins, leaving significant conjunctival defects requiring reconstruction. In this study we report the results of using fresh frozen amniotic membrane grafts (AMG) after wide excision of potentially malignant lesions.MethodsRetrospective review of 53 patients; between January 2011 and April 2014. Conjunctival lesions were excised with a non-touch technique (2 mm margin) and sent for histopathological analysis. The surgical margins were treated with cryotherapy and a fresh frozen AMG was used to cover the defect...
February 17, 2017: Eye
https://www.readbyqxmd.com/read/28210404/infraorbital-nerve-decompression-for-infraorbital-neuralgia-causalgia-following-blowout-orbital-fractures-a-case-series
#2
Bijan Beigi, Mazda Beigi, Nuwan Niyadurupola, Manuel Saldana, Nabil El-Hindy, Deepak Gupta
The purpose of this study was to present the management of a series of patients referred with infraorbital nerve paraesthesia that developed after insignificant orbital floor fracture without diplopia or exophthalmos, and that did not require initial surgical repair. This is a retrospective interventional case series. The main outcome and measures were assessment of preoperative symptoms including neuralgia and sensory symptoms; review of periorbital computed tomography (CT) scans; and assessment of postoperative effects of surgery for infraorbital nerve decompression...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28194221/a-removal-of-eye-movement-and-blink-artifacts-from-eeg-data-using-morphological-component-analysis
#3
Balbir Singh, Hiroaki Wagatsuma
EEG signals contain a large amount of ocular artifacts with different time-frequency properties mixing together in EEGs of interest. The artifact removal has been substantially dealt with by existing decomposition methods known as PCA and ICA based on the orthogonality of signal vectors or statistical independence of signal components. We focused on the signal morphology and proposed a systematic decomposition method to identify the type of signal components on the basis of sparsity in the time-frequency domain based on Morphological Component Analysis (MCA), which provides a way of reconstruction that guarantees accuracy in reconstruction by using multiple bases in accordance with the concept of "dictionary...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28192795/wide-field-en-face-swept-source-optical-coherence-tomography-features-of-extrafoveal-retinoschisis-in-highly-myopic-eyes
#4
Wei Xiao, Zhuoting Zhu, Capucine Odouard, Ou Xiao, Xinxing Guo, Mingguang He
Purpose: To evaluate the features of extrafoveal retinoschisis (EFRS) in highly myopic eyes detected by swept-source optical coherence tomography (SS-OCT). Methods: In this retrospective case series, 89 eyes of 65 patients with high myopia and coexisting EFRS were included. The participants underwent a comprehensive ophthalmologic examination, including visual acuity, ocular biometry, refraction, and perimetry. Three-dimensional wide-field scans were obtained with SS-OCT, and en face images were reconstructed with custom software...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28187309/eye-movement-during-retrieval-of-emotional-autobiographical-memories
#5
Mohamad El Haj, Jean-Louis Nandrino, Pascal Antoine, Muriel Boucart, Quentin Lenoble
This study assessed whether specific eye movement patterns are observed during emotional autobiographical retrieval. Participants were asked to retrieve positive, negative and neutral memories while their scan path was recorded by an eye-tracker. Results showed that positive and negative emotional memories triggered more fixations and saccades but shorter fixation duration than neutral memories. No significant differences were observed between emotional and neutral memories for duration and amplitude of saccades...
February 7, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28185781/classification-of-orbital-exenteration-and-reconstruction
#6
Marco R Kesting, Steffen Koerdt, Niklas Rommel, Thomas Mücke, Klaus-Dietrich Wolff, Christopher P Nobis, Florian Ringel, Gesche Frohwitter
Orbital exenteration (OE) is considered to be a mutilating surgical procedure reserved for relentlessly progressive neoplastic disorders or extensive facial trauma with unfavourable eye involvement. Malignant tumours, accounting for the majority of ablative orbital surgeries, may be caused by primary orbital tumours or secondarily by neoplasias from the surrounding skin, the maxillary sinus or intracranial malignomas. Orbital exenteration following trauma is mostly caused by penetrating globe defects or extended infections with the danger of intracranial effects...
January 10, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28169905/reconstruction-of-large-orbital-posterior-floor-wall-fracture-considering-orbital-floor-slope-using-endoscope
#7
Jinhwan Park, Jungah Huh, Joonsik Lee, Minwook Chang, Hwa Lee, Minsoo Park, Sehyun Baek
PURPOSE: Reconstruction of a large orbital fracture extending to the posterior wall of the maxillary sinus is difficult and challenging. In this study, the authors present transconjunctival or transcaruncular approach using endoscopy and layered porous polyethylene barrier sheets to manage large orbital floor wall fracture. METHODS: A retrospective review of all patients who underwent reconstruction of large orbital floor wall fractures between June 2009 and July 2015 was conducted...
February 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28158083/holographic-microinformation-hiding
#8
Tomoyoshi Shimobaba, Yutaka Endo, Ryuji Hirayama, Daisuke Hiyama, Yuki Nagahama, Satoki Hasegawa, Marie Sano, Takayuki Takahashi, Takashi Kakue, Minoru Oikawa, Tomoyoshi Ito
We propose a holographic microinformation hiding scheme in which the embedding information to be embedded is small and imperceptible to the human eyes. This scheme converts the embedding information into a complex amplitude via scaled diffraction. The complex amplitude of the reduced embedding information is added to the complex amplitude of the host image, followed by conversion to a hologram. The reduced embedded information is inconspicuous from the hologram during the reconstruction process; however, the reduction leads to the degradation of the embedded image quality...
February 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28157900/single-camera-full-range-high-resolution-spectral-domain-optical-coherence-tomography
#9
En Bo, Si Chen, Dongyao Cui, Shi Chen, Xiaojun Yu, Yuemei Luo, Linbo Liu
We developed spectral domain optical coherence tomography using a dual-channel spectrometer for complex conjugate artifacts (CCA) suppression. We used a three-line charge coupled device to simultaneously detect two interferometric spectra with 2π/3 phase difference. The complex interferometric signal was reconstructed by trigonometric manipulation of two real interferometric spectra, and then full-range images were obtained by use of inverse Fourier transform. Artifacts at direct current (DC) and the ghost remnant of the CCA are common issues with the previously reported two-spectrometer method because the slight mismatching between two spectral detection channels had strong negative effects on CCA suppression and appeared to be the limiting factor on system performance...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28147400/internal-limiting-membrane-flap-techniques-for-the-repair-of-large-macular-holes-a-short-term-follow-up-of-anatomical-and-functional-outcomes
#10
J Guber, C Lang, C Valmaggia
Background To evaluate the technique of inverted internal limiting membrane (ILM) flaps for the management of large macular holes and autologous ILM free flaps for non-closing macular holes. Patients and methods All macular holes were treated with pars plana vitrectomy and dual blue assisted ILM flap technique. The inverted ILM flap was created as a primary procedure for large macular holes (diameter > 400 µm). On the other hand, the free ILM flap technique was used as a secondary procedure for non-closing macular holes after failed initial standard procedure...
February 1, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28146242/positron-emission-tomography-for-the-development-and-characterization-of-corneal-permanence-of-ophthalmic-pharmaceutical-formulations
#11
Anxo Fernández-Ferreiro, Jesús Silva-Rodríguez, Francisco Javier Otero-Espinar, Miguel González-Barcia, María Jesús Lamas, Alvaro Ruibal, Andrea Luaces-Rodriguez, Alba Vieites-Prado, Tomas Sobrino, Michel Herranz, Lara García-Varela, José Blanco-Mendez, María Gil-Martínez, María Pardo, Alexis Moscoso, Santiago Medín-Aguerre, Juan Pardo-Montero, Pablo Aguiar
Purpose: This work is aimed at describing the utility of positron emission tomography/computed tomography (PET/CT) as a noninvasive tool for pharmacokinetic studies of biopermanence of topical ocular formulations. Methods: The corneal biopermanence of a topical ophthalmic formulation containing gellan gum and kappa carragenan (0.82% wt/vol) labeled with 18Fluorine (18F) radiotracers (18F-FDG and 18F-NaF) was evaluated by using a dedicated small-animal PET/CT, and compared with the biopermanence of an aqueous solution labeled with the same compounds...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28145930/combined-endoscopic-and-trans-palpebral-orbital-reconstruction-for-silent-sinus-syndrome
#12
Riccardo Tieghi, Nicola Malagutti, Luisa Valente, Giulia Carnevali, Luigi C Clauser
Silent Sinus Syndrome is defined as a painless spontaneous and progressive enophthalmos and hypoglobus with maxillary sinus hypoplasia and orbital floor resorption. It is caused by maxillary sinus atelectasis in a setting of ipsilateral chronic maxillary sinus hypoventilation. The syndrome was first described in 1964 by Montgomery, but the term "Silent Sinus Syndrome" was not coined until 1994 by Soparkar. The aetiology is still controversial: some authors postulate a basal hypoplastic sinus, other suggest an acquired process due to an obstruction of the ostium in the medium meatus...
January 31, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28145929/reconstruction-of-extensive-orbital-exenteration-defects-using-an-anterolateral-thigh-vastus-lateralis-chimeric-flap
#13
Tekin Simsek, Murat Sinan Engin, Kamil Yildirim, Enes Agah Kodalak, Ahmet Demir
Neglected malignant tumors within the orbital region can invade the eyeball, extraocular muscles, and bone substance surrounding the eye. Such patients require orbital exenteration, which may involve extraocular skeletal structures (even exposing paranasal sinuses), resulting in 3-dimensional defects requiring reconstruction. This study presents our experience with anterolateral thigh vastus lateralis (ALT/VL) chimeric free flaps for the reconstruction of extensive orbital exenteration defects involving various paranasal sinuses...
January 31, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28141513/efficient-oct-volume-reconstruction-from-slitlamp-microscopes
#14
Stefanos Apostolopoulos, Raphael Sznitman
Since its introduction 25 years ago, Optical Coherence Tomography (OCT) has contributed tremendously to diagnostic and monitoring capabilities of pathologies in the field of ophthalmology. Despite rapid progress in hardware and software technology however, the price of OCT devices has remained high, limiting their use in private practice and in screening examinations. In this paper, we present a slitlamp-integrated OCT device, built with off-the-shelf components, which can generate high-quality volumetric images of the posterior eye segment...
January 26, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28113859/real-time-eye-writing-recognition-using-electrooculogram-eog
#15
Kwang-Ryeol Lee, Won-Du Chang, Sungkean Kim, Chang-Hwan Im
Eye movements can be used as alternative inputs for human-computer interface (HCI) systems such as virtual or augmented reality systems as well as new communication ways for patients with locked-in syndrome. In this study, we developed a real-time electrooculogram (EOG)-based eye-writing recognition system, with which users can write predefined symbolic patterns with their volitional eye movements. For the 'eye-writing' recognition, the proposed system first reconstructs the eye-written traces from EOG waveforms in real-time; then, the system recognizes the intended symbolic inputs with a reliable recognition rate by matching the input traces with the trained eye-written traces of diverse input patterns...
March 15, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28110637/surgical-reconstruction-of-traumatic-ciliary-body-dialysis-a-case-report
#16
Adam Kluś, Mariusz Kosatka, Milena Kozera, Marek Rękas
BACKGROUND: A cyclodialysis cleft is a gap resulting from disruption of the longitudinal fibers constituting the ciliary body attachment to the scleral spur. The cyclodialysis cleft can be of traumatic or iatrogenic origin, and it may occur during intraocular surgery or as a result of a glaucoma operation. In this report we present a surgical technique to treat cyclodialysis: cyclopexy combined with phacoemulsification subluxation lens, transscleral suturing of Cionni ring, and intraocular lens implantation with iris cerclage suture...
January 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28105976/early-subretinal-allograft-rejection-is-characterized-by-innate-immune-activity
#17
Kevin P Kennelly, Toby M Holmes, Deborah M Wallace, Cliona O'Farrelly, David J Keegan
<p>Successful subretinal transplantation is limited by considerable early graft loss, despite pharmacological suppression of adaptive immunity. We postulated that early innate immune activity is a dominant factor in determining graft survival and chose a non-immunosuppressed mouse model of retinal pigment epithelial (RPE) cell transplantation to explore this.</p><p>Expression of almost all measured cytokines by DH01 RPE cells increased significantly following graft preparation and the neutrophil chemoattractant, KC/GRO/CINC, was most significantly increased...
January 20, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28097437/two-and-three-dimensional-topographic-analysis-of-pathologically-myopic-eyes-with-dome-shaped-macula-and-inferior-staphyloma-by-spectral-domain-optical-coherence-tomography
#18
Antonio García-Ben, Radua Kamal-Salah, Ignacio García-Basterra, Ana Gonzalez Gómez, María José Morillo Sanchez, Jose Manuel García-Campos
PURPOSE: To investigate the posterior anatomical structure of pathologically myopic eyes with dome-shaped macula and inferior staphyloma using spectral domain optical coherence tomography (SD-OCT). METHODS: Our database of 260 pathologically myopic eyes was analyzed retrospectively to identify patients with dome-shaped macula and inferior staphyloma. All patients underwent vertical and horizontal SD-OCT scans across the central fovea, with three-dimensional macular map reconstruction...
January 17, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28088129/in-vitro-eye-irritation-testing-using-the-open-source-reconstructed-hemicornea-a-ring-trial
#19
Karsten R Mewes, Maria Engelke, Michaela Zorn-Kruppa, Melinda Bartok, Rashmi Tandon, Johanna M Brandner, Dirk Petersohn
Aim of the present ring trial was to prove whether two new methodological approaches for the in vitro classification of eye irritating chemicals can be reliably transferred from the developers' laboratories to other sites.Both test methods are based on the well-established open source reconstructed 3D hemicornea models. In the first approach, the initial depth of injury in the hemicornea model after chemical treatment is derived from the quantitative analysis of histological sections. In the second approach tissue viability, as a measure for corneal damage after chemical treatment, is analyzed separately for epithelium and stroma of the hemicornea model...
January 14, 2017: ALTEX
https://www.readbyqxmd.com/read/28079655/microarchitecture-of-schlemm-canal-before-and-after-selective-laser-trabeculoplasty-in-enhanced-depth-imaging-optical-coherence-tomography
#20
Alon Skaat, Michael S Rosman, Jason L Chien, Mark P Ghassibi, Jeffrey M Liebmann, Robert Ritch, Sung Chul Park
PURPOSE: To characterize the in vivo effect of selective laser trabeculoplasty (SLT) on the Schlemm canal (SC) in eyes with primary open-angle glaucoma (POAG). MATERIALS AND METHODS: Eighty-one serial horizontal enhanced depth imaging optical coherence tomograph B-scans (interval between B-scans, ∼35 μm) of the nasal corneoscleral limbus were obtained before and 4 weeks after SLT. Fifty B-scans in the overlapping regions before and after SLT were selected for analysis based on the structures of aqueous and blood vessels as landmarks...
January 10, 2017: Journal of Glaucoma
keyword
keyword
34657
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"