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https://www.readbyqxmd.com/read/29230976/efficacy-and-safety-of-a-large-conjunctival-autograft-for-recurrent-pterygium
#1
Jun Seok Lee, Sang Won Ha, Sung Yu, Gwang Ja Lee, Young Jeung Park
PURPOSE: To evaluate the efficacy and safety of pterygium excision using a large conjunctival autograft for the treatment of recurrent pterygium. METHODS: The medical records of 120 patients (126 eyes) with recurrent pterygium were reviewed. For each affected eye, pterygium excision with a large conjunctival autograft was performed. The graft was harvested from the superior bulbar area and measured more than 8 × 10 mm in size. Only patients who completed at least six months of follow-up were included...
December 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/29230414/analysis-of-the-ocular-refractive-state-in-fighting-bulls-astigmatism-prevalence
#2
Juan M Bueno, Matteo Lo Sapio, J Manuel Sanes, Juan Seva
The purpose of this study was to describe the ocular refractive state (ORS) of fighting bulls. The study consisted of 90 ophthalmological healthy animals (85 in post-mortem and 5 in living conditions, resp.). The ORS of the eyes (2 per animal) was determined using streak retinoscopy. In vivo animals were assessed at a fighting bull farm facility. Post-mortem measurements were carried out at a local arena. The ORS along the horizontal meridian ranged between -1.00 and +2.50 diopters (D), with a mean of +0.66 ± 0...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29229949/investigations-of-the-optical-properties-of-ganas-alloys-by-first-principle
#3
Damir Borovac, Chee-Keong Tan, Nelson Tansu
We present a Density Functional Theory (DFT) analysis of the optical properties of dilute-As GaN1-xAsx alloys with arsenic (As) content ranging from 0% up to 12.5%. The real and imaginary parts of the dielectric function are investigated, and the results are compared to experimental and theoretical values for GaN. The analysis extends to present the complex refractive index and the normal-incidence reflectivity. The refractive index difference between GaN and GaNAs alloys can be engineered to be up to ~0.35 in the visible regime by inserting relatively low amounts of As-content into the GaN system...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29227554/simple-and-rapid-tissue-clearing-method-for-three-dimensional-histology-of-the-pancreas
#4
Hang Sheung Wong, Patrick Ka Kit Yeung, Hei Ming Lai, Karen Siu Ling Lam, Wu Wutian, Sookja Kim Chung
Previously, high-resolution three-dimensional imaging of a whole and intact pancreas was not possible, since light is scattered when it passes through cell compartments with different refractive indices. CLARITY is one of the tissue clearing techniques that has yielded success with the central nervous system. To preserve tissue integrity after delipidation, conventional protocols embed tissue in an acrylamide-based hydrogel, which involves the use of specialized equipment. Recently, we determined that the hydrogel-embedding step could be simplified and replaced by passive tissue fixation in 4% paraformaldehyde (PFA)...
December 11, 2017: Current Protocols in Cell Biology
https://www.readbyqxmd.com/read/29227515/a-novel-corneal-remodeling-technique-for-the-management-of-keratoconus
#5
Cesar Carriazo, Maria Jose Cosentino
PURPOSE: To describe a novel technique to reshape the ectatic cornea by means of crescent keratectomy performed with an excimer laser using a mask. METHODS: A crescent-shaped perforation at the base of the mask allowed the laser ablation to be directed only to the intended region, shielding the remaining cornea. This technique was performed in 3 eyes of 3 patients with keratoconus grade 2 to 3. Arcs of 180° and 360° had been performed depending on the severity of the keratoconus...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227514/management-and-outcomes-of-retained-lenticules-and-lenticule-fragments-removal-after-failed-primary-smile-a-case-series
#6
Sri Ganesh, Sheetal Brar, Apostolos Lazaridis
PURPOSE: To describe the management of and report the outcomes following the removal of retained lenticules or lenticule fragments after a complicated small incision lenticule extraction (SMILE). METHODS: Three patients were referred for consultation due to intraoperative complications during SMILE. In case 1, the lenticule was torn during extraction and a central fragment was retained in the pocket. In case 2, the inferior part of the lenticule remained attached at the anterior plane and its detached, superior part was dislocated and folded at the inferior part of the pocket...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227513/in-vivo-early-corneal-biomechanical-changes-after-corneal-cross-linking-in-patients-with-progressive-keratoconus
#7
Riccardo Vinciguerra, Vito Romano, Esmaeil M Arbabi, Matthias Brunner, Colin E Willoughby, Mark Batterbury, Stephen B Kaye
PURPOSE: To report early corneal biomechanical changes after corneal cross-linking (CXL) in patients with keratoconus. METHODS: Thirty-four eyes of 34 patients undergoing CXL for progressive keratoconus were included in this prospective clinical study. Dynamic corneal response (DCR) parameters obtained with the Corvis ST (OCULUS Optikgeräte GmbH; Wetzlar, Germany) were assessed at baseline (day of CXL) and after 1 month of follow-up; conversely, corneal tomography with the Pentacam (OCULUS Optikgeräte GmbH) was assessed at baseline and at 1, 3, and 6 months after CXL...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227512/efficacy-and-safety-comparison-between-suberoylanilide-hydroxamic-acid-and-mitomycin-c-in-reducing-the-risk-of-corneal-haze-after-prk-treatment-in-vivo
#8
Govindaraj Anumanthan, Ajay Sharma, Michael Waggoner, Chuck W Hamm, Suneel Gupta, Nathan P Hesemann, Rajiv R Mohan
PURPOSE: This study compared the efficacy and safety of suberoylanilide hydroxamic acid (SAHA) and mitomycin C (MMC) up to 4 months in the prevention of corneal haze induced by photorefractive keratectomy (PRK) in rabbits in vivo. METHODS: Corneal haze in rabbits was produced with -9.00 diopter PRK. A single application of SAHA (25 μM) or MMC (0.02%) was applied topically immediately after PRK. Effects of the two drugs were analyzed by slit-lamp microscope, specular microscope, TUNEL assay, and immunofluorescence...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227511/predictive-formula-for-refraction-of-autologous-lenticule-implantation-for-hyperopia-correction
#9
Meng Li, Meiyan Li, Ling Sun, Katherine Ni, Xingtao Zhou
PURPOSE: To create a formula to predict refractive correction of autologous lenticule implantation for correction of hyperopia (with myopia in one eye and hyperopia in the contralateral eye). METHODS: In this prospective study, 10 consecutive patients (20 eyes) who had myopia in one eye and hyperopia in the contralateral eye were included. The preoperative spherical equivalent was -3.31 ± 1.73 diopters (D) for the myopic eyes and +4.46 ± 1.97 D for the hyperopic eyes...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227510/postoperative-corneal-asphericity-in-low-moderate-and-high-myopic-eyes-after-transepithelial-prk-using-a-new-pulse-allocation
#10
David T C Lin, Simon P Holland, Shwetabh Verma, John Hogden, Samuel Arba-Mosquera
PURPOSE: To evaluate the postoperative asphericity in low, moderate, and high myopic eyes after combined transepithelial photorefractive keratectomy and SmartSurfACE treatment (SCHWIND eye-tech-solutions GmbH, Kleinostheim, Germany). METHODS: In this retrospective case series, the outcomes of myopic SmartSurfACE were evaluated at 3 months postoperatively in 106 eyes and divided into low (less than -4.125 diopters [D]), moderate (-4.125 to -6.25 D), and high (more than -6...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227509/long-term-follow-up-of-lasek-with-mitomycin-c-performed-to-correct-myopia-in-thin-corneas
#11
Montserrat Garcia-Gonzalez, Pilar Drake Rodriguez-Casanova, Isabel Rodriguez-Perez, Alberto Rodero, Miguel A Teus
PURPOSE: To evaluate the long-term outcomes of laser-assisted subepithelial keratomileusis (LASEK) with intraoperative use of mitomycin C (MMC) performed on thin corneas for the correction of myopia. METHODS: This retrospective cohort study included 100 eyes with a preoperative central corneal thickness (CCT) thinner than 500 μm that underwent LASEK + MMC with at least 6 years of follow-up. Stability of visual acuity and refraction and the efficacy, safety, and predictability at the examinations 3 months and the last annual postoperative visit were analyzed...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227508/laboratory-evaluation-of-the-influence-of-decentration-and-pupil-size-on-the-optical-performance-of-a-monofocal-bifocal-and-trifocal-intraocular-lens
#12
Tamer Tandogan, Hyeck Soo Son, Chul Young Choi, Michael C Knorz, Gerd U Auffarth, Ramin Khoramnia
PURPOSE: To assess the influence of decentration and aperture size on the optical quality of different intraocular lenses (IOLs) of the same material, body design, and refractive power using standardized optical bench testing. METHODS: Using an optical bench set-up, an aspheric monofocal (CT ASPHINA 409M; Carl Zeiss Meditec, Jena, Germany), an aspheric diffractive bifocal (AT LISA 809M; Carl Zeiss Meditec), and an aspheric diffractive trifocal (AT LISA 839M; Carl Zeiss Meditec) intraocular lens (IOL) were evaluated, each with the same distance power, body design, and material...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227507/the-use-of-capsular-tension-rings-to-reduce-refractive-shift-in-patients-with-implantation-of-trifocal-intraocular-lenses
#13
Kristin Nistad, Frida Göransson, Eivind Støle, Hossein Shams, Björn Gjerdrum
PURPOSE: To determine whether use of a capsular tension ring (CTR) can increase refractive stability in patients with implantation of two different trifocal intraocular lenses (IOLs). METHODS: A prospective, consecutive series of eyes underwent refractive lens exchange with implantation of two different trifocal IOL designs: FineVision Micro F (non-toric) and FineVision POD FT (toric) (PhysIOL, Liege, Belgium). Power calculation was determined using the Haigis formula...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227506/comparison-of-methodologies-using-estimated-or-measured-values-of-total-corneal-astigmatism-for-toric-intraocular-lens-power-calculation
#14
Tiago B Ferreira, Paulo Ribeiro, Filomena J Ribeiro, João G O'Neill
PURPOSE: To compare the prediction error in the calculation of toric intraocular lenses (IOLs) associated with methods that estimate the power of the posterior corneal surface (ie, Barrett toric calculator and Abulafia-Koch formula) with that of methods that consider real measures obtained using Scheimpflug imaging: a software that uses vectorial calculation (Panacea toric calculator: http://www.panaceaiolandtoriccalculator.com) and a ray tracing software (PhacoOptics, Aarhus Nord, Denmark)...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29226716/-case-report-on-choroidal-effusion-after-oral-acetazolamide-administration-an-unusual-manifestation-of-a-well-known-idiosyncratic-effect
#15
András Hári-Kovács, Judit Soós, Tamás Gyetvai, Andrea Facskó, Mihály Végh
Sulpha drugs are widely employed in medicine for various diseases and disorders. During the last several decades, numerous papers had been published on supra ciliary and posterior choroidal effusion likely presenting as an idiosyncratic effect of these drugs especially of acetazolamide. In each publication, the effusion was associated with either an acute angle-closure glaucoma or transitory myopia or both of these as leading symptoms. In the current publication, authors report on two cases where the acetazolamide-induced choroidal effusion was an accidental finding without either a myopic shift in refraction or an acute elevation in intraocular pressure...
December 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29226423/patellar-tendinopathy-with-intra-tendinous-alteration-on-mri-may-be-related-to-patellofemoral-dysplasia
#16
Philippe M Tscholl, Roland M Biedert, Florian Wanivenhaus, Sandro F Fucentese
Patellar tendinopathy (PT) is a frequent overuse-injury of the extensor knee apparatus whereas as up to 30% of the athletes might suffer from persisting symptoms during their entire career. In the present case-control study, 47 patients (30.8±11.4 years) with PT with intra-tendinous alteration (PTita) of a minimum of ≥ 25% of the axial surface on MRI and minimum Blazina score of II (pain during without limiting sports activity) were included; MR images were analysed for trochlear geometry, patellar height/tilt, and tibial tubercle trochlear groove distance (TT-TG)...
December 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29225421/flow-through-microfluidic-immunosensors-with-refractive-index-matched-silica-monoliths-as-volumetric-optical-detection-elements
#17
M S Wiederoder, E L Kendall, J-H Han, R G Ulrich, D L DeVoe
A sensitive and rapid absorbance based immunosensor that utilizes ex situ functionalized porous silica monoliths as volumetric optical detection elements is demonstrated in this study. The porous monolith structure facilitates high capture probe density and short diffusion length scales, enabling sensitive and rapid assays. Silica monoliths, synthesized and functionalized with immunocapture probes off-chip before integration into a sealed thermoplastic microfluidic device, serve to capture target antigens during perfusion through the porous structure...
January 2018: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/29225219/layer-caused-an-anisotropic-terahertz-response-of-a-3d-printed-simulative-shale-core
#18
Xinyang Miao, Limei Guan, Rima Bao, Yizhang Li, Honglei Zhan, Kun Zhao, Xiaodong Wang, Fan Xu
Energy demands have motivated the development of shale formations as significant unconventional reservoirs. The anisotropy of shales plays a significant role in both the mechanical behavior and engineering activities. Alternating layers presented in shales affect the propagation of waves, causing anisotropy at various frequencies. Simplifying the complicated interior structures of shales is conducive to characterize the anisotropic properties. Therefore, simulative shale core samples were designed and fabricated using additive manufacturing processes, and layer-caused dielectric anisotropy was investigated by terahertz (THz) time-domain spectroscopy...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/29223239/phacoemulsification-with-intraocular-lens-implantation-after-previous-descemetorhexis-without-endothelial-keratoplasty
#19
Aaron R Kaufman, Ricardo M Nosé, Yifan Lu, Roberto Pineda
A 58-year-old woman with bilateral Fuchs endothelial corneal dystrophy presented with predominantly central guttata in the left eye causing visually significant stromal edema. A 4.0 mm descemetorhexis without endothelial keratoplasty was performed. At the 6-week follow-up, the central cornea had cleared completely and the central endothelial cell density (ECD) was 541 cells/mm2. The central corneal clearing remained stable for 2 years after the procedure; however, vision declined because of a visually significant cataract in the left eye...
November 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29223234/corneal-remodeling-after-implantation-of-a-shape-changing-inlay-concurrent-with-myopic-or-hyperopic-laser-in%C3%A2-situ-keratomileusis
#20
Roger F Steinert, Douglas D Koch, Beatrice Cochener, Alan Lang, Enrique Barragán-Garza, Arturo Chayet, Luis G Vargas
PURPOSE: To compare the induced addition (add)-power profile and epithelial remodeling between patients receiving hyperopic and myopic laser in situ keratomileusis (LASIK) concurrently with implantation of a corneal shape-changing inlay. SETTING: Specialty clinics in Monterrey and Tijuana, Mexico. DESIGN: Retrospective case series. METHODS: Preoperative hyperopic patients (mean spherical equivalent [SE] treatment +1...
November 2017: Journal of Cataract and Refractive Surgery
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