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https://www.readbyqxmd.com/read/27899387/activation-of-cytomegalovirus-corneal-endotheliitis-following-laser-in-situ-keratomileusis
#1
Tien-En Tan, Chui Ming Gemmy Cheung, Jodhbir S Mehta
A case of Cytomegalovirus (CMV) corneal endotheliitis following laser in-situ keratomileusis (LASIK) is presented. A 32-year-old man presented 3 weeks after uncomplicated myopic LASIK with unilateral LASIK flap oedema, interface fluid accumulation, keratic precipitates, anterior uveitis and raised intraocular pressure. Despite treatment with topical corticosteroids, he had 3 further recurrent episodes. Specular microscopy showed decreased endothelial cell density and aqueous humour. Polymerase chain reaction (PCR) testing was positive for CMV DNA...
November 29, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27878429/comparison-of-specular-microscopy-and-ultrasound-pachymetry-before-and-after-cataract-surgery
#2
Alberto López-Miguel, María Sanchidrián, Itziar Fernández, Alfredo Holgueras, Miguel J Maldonado
PURPOSE: To compare specular microscopy (Topcon SP-3000P, Topcon Corporation, Tokyo, Japan) and ultrasound (US) technology when evaluating central corneal thickness (CCT) prior to and after phacoemulsification. METHODS: Corneal edema was assessed in phacoemulsification patients due to senile cataract by measuring CCT preoperatively and 1 day, 1 month, and 3 months postoperatively. Bland-Altman analysis was performed to assess interchangeability between pachymetry techniques for each visit...
November 22, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27861306/enhancing-dmek-success-by-identifying-optimal-levels-of-trypan-blue-dye-application-to-donor-corneal-tissue
#3
Parag A Majmudar, Lauren Johnson
PURPOSE: The purpose of this study was to determine the correct concentration and duration of application of trypan blue dye to Descemet membrane endothelial keratoplasty (DMEK) donor corneal tissue before transplant to enhance visibility while minimizing damage to the tissue. METHODS: Corneas were precut for DMEK using an 8-mm punch, and each was stained with either 0.06% or 0.15% trypan blue for a duration of 1, 3, or 5 minutes. After staining, each tissue was placed in balanced salt solution and observed to determine how quickly the stain faded from the tissue using a grading system...
November 16, 2016: Cornea
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/27827347/imaging-pulsed-laser-deposition-growth-of-homo-epitaxial-srtio3-by-low-energy-electron-microscopy
#5
A J H van der Torren, S J van der Molen, J Aarts
By combining low-energy electron microscopy with in situ pulsed laser deposition we have developed a new technique for film growth analysis, making use of both diffraction and real-space information. Working at the growth temperature, we can use: the intensity and profile variations of the specular beam to follow the coverage in a layer-by-layer fashion; real-space microscopy to follow e.g. atomic steps at the surface; and electron reflectivity to probe the unoccupied band structure of the grown material. Here, we demonstrate our methodology for homo-epitaxial growth of SrTiO3...
November 9, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27824383/360-degree-iris-burns-following-conductive-keratoplasty
#6
Hanefi Çakir, Selim Genç, Emre Güler
PURPOSE: The authors report a case with multiple iris burns after conductive keratoplasty to correct hyperopia. METHODS: Case report. RESULTS: A 52-year-old woman with hyperopia had a previous conductive keratoplasty procedure and underwent a conductive keratoplasty re-treatment 6 months later. Postoperatively, she presented with 360-degree iris burns in both eyes that were correlated with the corneal conductive keratoplasty scars. In addition, specular microscopy revealed decreased endothelial cell density for both eyes...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27746297/corneal-endothelial-cell-density-in-children-normative-data-from-birth-to-5-years-old
#7
Uri Elbaz, Kamiar Mireskandari, Nasrin Tehrani, Carl Shen, Muhammad Saad Khan, Sara Williams, Asim Ali
PURPOSE: To establish a normative database of endothelial cell density (ECD) using in vivo specular microscopy in children under 5 years old. DESIGN: Cross-sectional study. METHODS: Specular microscopy was performed during a clinic visit in cooperative children in the standard upright position. In uncooperative children, specular microscopy was performed in the lateral decubitus position under general anesthesia, before surgery for other reasons...
January 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27741015/donor-endothelial-cell-density-measurements-do-not-change-immediately-after-dmek-preparation
#8
Zachary M Mayko, Beth Ann Benetz, Harry Menegay, Christopher P Donovan, Christopher G Stoeger, Mark A Terry, Jonathan H Lass
PURPOSE: To evaluate a single eye bank's measurement of endothelial cell density (ECD) of Descemet membrane endothelial keratoplasty (DMEK) grafts before and after preparation using 2 separate counting methods. METHODS: A series of 60 donor tissues were prepared for DMEK surgery. One to 4 specular images of the central endothelium were taken both before and after preparation, and ECDs were evaluated for a total of 345 unique images. Images were then masked and provided to the Cornea Image Analysis Reading Center (CIARC) for independent analysis...
October 12, 2016: Cornea
https://www.readbyqxmd.com/read/27741012/visual-recovery-and-clinical-outcomes-with-torn-donor-tissue-a-comparative-study-on-descemet-membrane-endothelial-keratoplasty
#9
Christophe Panthier, Romain Courtin, Emmanuel Guilbert, Damien Gatinel, Alain Saad
PURPOSE: To evaluate the clinical impact of implanting donor tissue torn during preparation for the Descemet membrane endothelial keratoplasty procedure. METHODS: In this single-center retrospective analysis of consecutive cases, 10 cases with torn donor tissue from one surgeon's caseload of 175 procedures were analyzed and compared with control cases. Best-corrected visual acuity, endothelial cell density of the donor tissue measured by specular microscopy, and the recipient's central corneal thickness were recorded preoperatively and again 1, 3, and 6 months after surgery...
October 12, 2016: Cornea
https://www.readbyqxmd.com/read/27726960/special-report-american-academy-of-ophthalmology-task-force-recommendations-for-specular-microscopy-for-phakic-intraocular-lenses
#10
Scott MacRae, Jack T Holladay, Gene Hilmantel, Don Calogero, Samuel Masket, Walter Stark, Adrian Glasser, Eva Rorer, Michelle E Tarver, Tieuvi Nguyen, Malvina Eydelman
No abstract text is available yet for this article.
October 7, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27723007/reproducibility-and-repeatability-of-central-corneal-thickness-measurement-in-healthy-eyes-using-four-different-optical-devices
#11
Remzi Karadag, Murat Unluzeybek, Ozgur Cakici, Ayse Yagmur Kanra, Huseyin Bayramlar
AIM: The aim of the study is to compare the measurements of central corneal thickness (CCT) performed by two examiners with four different methods at different times inter- and intra-individually. METHODS: Thirty healthy people were included in the study. In these measurements, an optical low-coherence reflectometry (OLCR), an optic coherence tomography (OCT), a specular microscopy (SM), and a corneal topography (CT) were used. Two examiners performed the measurements in a consecutive manner...
October 8, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27709441/correlation-between-intraocular-pressure-and-central-corneal-thickness-in-persian-children
#12
Mahmood Nejabat, Fatemeh Heidary, Mohammad Reza Talebnejad, Ramin Salouti, Mohammad Hossein Nowroozzadeh, Masoumeh Masoumpour, Hamideh Mahdaviazad, Zahra Tajbakhsh, Maryam Keshtkar, Hossein Jamali, Mohammad Reza Khalili, Hossein Movahedan, Narges Roustaei, Reza Gharebaghi
INTRODUCTION: This study aimed to determine intraocular pressure (IOP) and central corneal thickness (CCT) measurements in healthy Persian children to find clinical reference values in this ethnicity. Additionally, we examined the possible relationship between these measurements. METHODS: This cross-sectional study included 262 eyes of 131 Persian primary school children between 6 and 13 years of age. All eyes were healthy and had no anterior or posterior segment abnormalities, corneal disease, or evidence of glaucoma...
October 5, 2016: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/27686663/effects-of-mydrin-eye-drops-on-central-corneal-thickness-values-in-adult-patients-with-myopia
#13
Yuan Zeng, Jian-Hua Gao
OBJECTIVE: This study aimed to evaluate the effect of Mydrin eye-drops on central corneal thickness values and investigate the duration of the effect. METHODS: In this prospective randomised self-controlled study, we enrolled 60 myopic patients (120 eyes) undergoing corneal laser refractive surgery. The central corneal thickness was measured before and one and four hours after administration of Mydrin eye-drops (major components are tropicamide and phenylephrine hydrochloride) using the Orbscan II anterior segment analysis system and a SP-2000P non-contact specular microscope, respectively...
September 29, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27621781/effects-of-laser-peripheral-iridotomy-on-corneal-endothelial-cell-density-and-cell-morphology-in-primary-angle-closure-suspect-subjects
#14
Hossein Jamali, Sara Jahanian, Reza Gharebaghi
PURPOSE: To evaluate the effects of prophylactic laser peripheral iridotomy on corneal endothelial cell density and cell morphology in subjects with primary angle closure suspect (PACS) within a one-year follow-up period. METHODS: In this quasi-experimental prospective study, from June 2012 to November 2013, thirty-five PACS eyes underwent laser peripheral iridotomy at clinics affiliated to Shiraz University of Medical Sciences, Shiraz, Iran. After obtaining informed consent, specular microscopy was performed at baseline and at 3-month, 6-month and 12-month follow-up visits...
July 2016: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/27621588/risk-factors-for-corneal-endothelial-cell-loss-by-cataract-surgery-in-eyes-with-pseudoexfoliation-syndrome
#15
Yumi Hasegawa, Ryohei Nejima, Yosai Mori, Toshihiro Sakisaka, Keiichiro Minami, Kazunori Miyata, Tetsuro Oshika
PURPOSE: The aim of this study was to investigate the factors associated with decreases in corneal endothelial cell density (ECD) resulting from cataract surgery in eyes with pseudoexfoliation syndrome (PEX). METHODS: The clinical records of 78 eyes of 78 patients with PEX who had undergone cataract surgery were reviewed. ECD was measured preoperatively and at 3 months postoperatively with specular microscopy. Multiple regression analysis was used to assess the factors that were significantly related to the rate of ECD loss...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27609159/delayed-onset-of-congenital-hereditary-endothelial-dystrophy-due-to-compound-heterozygous-slc4a11-mutations
#16
Babu Lal Kumawat, Ranjan Gupta, Arundhati Sharma, Seema Sen, Shikha Gupta, Radhika Tandon
BACKGROUND: Congenital hereditary endothelial dystrophy (CHED) is an autosomal recessive disorder characterized by bilateral, symmetrical, noninflammatory corneal clouding (edema) present at birth or shortly thereafter. This study reports on an unusual delayed presentation of CHED with compound heterozygous SLC4A11 mutations. MATERIALS AND METHODS: A 45-year-old female, presenting with bilateral decreased vision since childhood that deteriorated in the last 5 years, was evaluated to rule out trauma, viral illness, chemical injury, glaucoma, and corneal endothelial dystrophies...
July 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27588090/effects-of-diabetic-keratopathy-on-corneal-optical-density-central-corneal-thickness-and-corneal-endothelial-cell-counts
#17
Feng Gao, Tao Lin, Yingzhe Pan
Diabetic keratopathy is an ocular complication that occurs with diabetes. In the present study, the effect of diabetic keratopathy on corneal optical density, central corneal thickness, and corneal endothelial cell count was investigated. One hundred and eighty diabetic patients (360 eyes) were enrolled in the study during the period from March, 2012 to March, 2013. The patients were divided into three age groups: <5, 5-10 and >10 years, with 60 patients per group (120 eyes). During the same period, 60 healthy cases (120 eyes) were selected and labeled as the normal control group...
September 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27585920/in-vivo-confocal-microscopic-observations-of-eyes-diagnosed-with-posterior-corneal-vesicles
#18
Atsushi Shiraishi, Xiaodong Zheng, Yuri Sakane, Yuko Hara, Yasuhito Hayashi
PURPOSE: To determine the morphological characteristics of the cornea in eyes with posterior corneal vesicles (PCV) determined by in vivo confocal microscopy (IVCM). In addition, to compare the morphological characteristics of the corneas of eyes with PCV to those of eyes with posterior polymorphous corneal dystrophy (PPCD). METHODS: Three males and three females aged 17-75 years who were diagnosed with PCV by slit-lamp biomicroscopic findings were studied. The slit-lamp findings, specular microscopic images, corneal endothelial cell densities (CDs), central corneal thickness, and IVCM images were evaluated...
September 1, 2016: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27583800/corneal-endothelium-and-phacoemulsification
#19
Hiroshi Takahashi
Phacoemulsification has become the most commonly used procedure in cataract surgery owing to the development of new devices and surgical techniques; however, corneal endothelial damage still represents a serious complication. Although several factors are known to cause corneal endothelial damage, effects of irrigating pressure and temperature rise in the anterior chamber should also be considered. Furthermore, free radical formation is another important harmful factor. Ultrasound in aqueous solution induces cavitation, which results in the formation of hydroxyl free radicals that damage the corneal endothelium...
November 2016: Cornea
https://www.readbyqxmd.com/read/27575166/polarizing-properties-and-structure-of-the-cuticle-of-scarab-beetles-from-the-chrysina-genus
#20
Lía Fernández Del Río, Hans Arwin, Kenneth Järrendahl
The optical properties of several scarab beetles have been previously studied but few attempts have been made to compare beetles in the same genus. To determine whether there is any relation between specimens of the same genus, we have studied and classified seven species from the Chrysina genus. The polarization properties were analyzed with Mueller-matrix spectroscopic ellipsometry and the structural characteristics with optical microscopy and scanning electron microscopy. Most of the Chrysina beetles are green colored or have a metallic look (gold or silver)...
July 2016: Physical Review. E
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