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https://www.readbyqxmd.com/read/29762889/endothelial-cell-density-and-characterization-of-corneal-endothelial-cells-in-the-tawny-owl-strix-aluco-using-specular-microscopy
#1
Natàlia Coyo, Marta Leiva, Daniel Costa, Rafael Molina, Olga Nicolás, Jose Ríos, Maria Teresa Peña
OBJECTIVE: To determine endothelial cell density (ECD) and morphology and morphometry of corneal endothelial cells in the tawny owl (Strix aluco), as well as to report the effects of aging on these parameters. ANIMAL STUDY AND PROCEDURES: Twenty tawny owls were included in the study and classified into 2 groups according to their age: fledglings (<1 year old) and adults (>1 year old). Central corneal endothelium was studied by means of noncontact specular microscopy (Specular Microscope SP-2000P; Topcon, Tokyo, Japan), and results for ECD (cells/mm2 ), mean cell area ((MCA (μm2 )), polymegathism (CV), and pleomorphism (% hexagonal cells) were obtained...
May 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29757851/effect-of-posterior-corneal-vesicles-on-corneal-endothelial-cell-density-and-anisometropic-amblyopia
#2
Atsushi Noguchi, Naoki Okumura, Chie Sotozono, Shigeru Kinoshita
PURPOSE: To evaluate the effect of corneal vesicles in patients with posterior corneal vesicles (PCV) on corneal endothelial cell (CEC) density and the acquisition of amblyopia. METHODS: In this retrospective study of patients with PCV (18 eyes of 14 patients), CEC density was examined by noncontact specular microscopy during each follow-up examination. Best-corrected visual acuity and the objective refractive error were also examined. RESULTS: Of the 14 total patients, 10 were diagnosed with PCV and 4 were diagnosed with bilateral suspected PCV or posterior polymorphous corneal dystrophy (PPCD), and in all patients, no ocular abnormality other than corneal vesicles was observed...
May 1, 2018: Cornea
https://www.readbyqxmd.com/read/29737973/in-vivo-endothelial-cell-density-decline-in-the-early-postoperative-phase-after-descemet-membrane-endothelial-keratoplasty
#3
Alina Miron, Marieke Bruinsma, Lisanne Ham, Sontje-Chiao Schaal, Lamis Baydoun, Isabel Dapena, Silke Oellerich, Gerrit R J Melles
PURPOSE: To evaluate endothelial cell density (ECD) in the first 6 months after Descemet membrane endothelial keratoplasty (DMEK) by eliminating method error as a confounding variable. METHODS: From 24 DMEK eyes operated for Fuchs endothelial corneal dystrophy, from which specular microscopy images could be taken at 1 day and 6 months postoperatively, ECD values were compared between these 2 time points. RESULTS: Using the 1-day ECD measurement as baseline, mean ECD decreased from 1913 (±326) cells/mm to 1524 (±393) cells/mm at 6 months, a decline of -18 (±19)%...
June 2018: Cornea
https://www.readbyqxmd.com/read/29734203/specular-microscopy
#4
Beth Ann Benetz, Jonathan H Lass
No abstract text is available yet for this article.
June 2018: Cornea
https://www.readbyqxmd.com/read/29715058/corneal-endothelial-changes-in-beh%C3%A3-et-s-patients-with-inactive-ocular-involvement
#5
Cem Cankaya, Tongabay Cumurcu, Abuzer Gunduz, Ilknur Fırat
PURPOSE: To evaluate alterations in the corneal endothelial layer in Behçet's disease (BD) with inactive ocular involvement using specular microscopy. MATERIALS AND METHODS: Thirty-three eyes of 33 BD patients who had at least one anterior segment involvement and no active inflammation in the last 3 months were included in the study (group 1). Twenty-seven of the thirty-three BD patients had an anterior uveitis attack and six of them had a panuveitis (both anterior and posterior involvement) attack...
May 1, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29703288/thermal-capsulotomy-initial-clinical-experience-intraoperative-performance-safety-and-early-postoperative-outcomes-of-precision-pulse-capsulotomy-technology
#6
Joobin Hooshmand, Robin G Abell, Penny Allen, Brendan J Vote
PURPOSE: To assess the clinical safety and performance of a new thermal capsulotomy device in patients having cataract surgery. SETTING: Launceston Eye Institute, Launceston, Tasmania, Australia. DESIGN: Prospective case series. METHODS: This single-surgeon consecutive series comprised eyes having capsulotomy with a precision pulse capsulotomy (PPC) device (Zepto). Baseline demographic information and preoperative, intraoperative, and early postoperative outcomes, including complications, intraocular pressure (IOP), flare photometry, corneal and retinal thickness, and specular microscopy were collected and analyzed...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29681179/-femtosecond-laser-assisted-keratoplasty
#7
László Módis, Eszter Szalai, Zsuzsanna Flaskó, Bence Kolozsvári, András Berta
INTRODUCTION AND AIM: To present our results on femtosecond laser-assisted penetrating keratoplasty. PATIENTS AND METHOD: Twenty-five eyes of 25 patients underwent surgery with the following indications: pseudophakic bullous keratopathy (n = 10), keratoconus (n = 4), corneal dystrophy (n = 5), corneal scar (n = 4), band keratopathy (n = 2). Trephination of both the donor and recipient corneas were performed with VisuMax femtosecond laser device (Carl Zeiss Meditec AG, Jena, Germany)...
April 2018: Orvosi Hetilap
https://www.readbyqxmd.com/read/29680687/segmentation-of-corneal-endothelium-images-using-a-u-net-based-convolutional-neural-network
#8
Anna Fabijańska
Diagnostic information regarding the health status of the corneal endothelium may be obtained by analyzing the size and the shape of the endothelial cells in specular microscopy images. Prior to the analysis, the endothelial cells need to be extracted from the image. Up to today, this has been performed manually or semi-automatically. Several approaches to automatic segmentation of endothelial cells exist; however, none of them is perfect. Therefore this paper proposes to perform cell segmentation using a U-Net-based convolutional neural network...
April 18, 2018: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/29668572/atypical-presentation-of-iridocorneal-endothelial-syndrome-with-band-keratopathy-but-no-corneal-edema-managed-with-descemet-membrane-endothelial-keratoplasty
#9
Vasiliki Zygoura, Itay Lavy, Robert M Verdijk, Diana Santander-García, Lamis Baydoun, Isabel Dapena, Gerrit R J Melles
PURPOSE: To report an unusual presentation of iridocorneal endothelial (ICE) syndrome associated with band keratopathy and its management with ethylenediamine-tetraacetic acid (EDTA) chelation and Descemet membrane endothelial keratoplasty (DMEK). METHODS: A 57-year-old female patient presented with unilateral progressive painless visual impairment, corneal band keratopathy, and morphological corneal endothelial changes without corneal edema or any previous ophthalmic, medical, or family history...
April 17, 2018: Cornea
https://www.readbyqxmd.com/read/29623314/a-promising-solution-to-the-limits-of-microscopes-for-smooth-surfaces-fluorophore-aided-scattering-microscopy
#10
Liang Li, Jian Liu, Yan Liu, Chenguang Liu, He Zhang, Xiaoyu You, Kang Gu, Yuhang Wang, Jiubin Tan
Reflected light escape and mesoscopic penetration are two serious problems for optical characterization using microscopes. For specular samples with steep slopes, the detector does not receive enough light and the detection algorithm is not be able to detect the peak position, and would generate non-measured points. Moreover, the mesoscopic penetration phenomenon has been ignored when measuring and observing the shapes of samples with multi-layer structures. But this phenomenon, due to the transparency of materials to certain wavelengths of light, may result in serious errors in the measurements of the heights of samples, as well as errors in the descriptions of their shapes...
April 6, 2018: Nanoscale
https://www.readbyqxmd.com/read/29620567/reduction-of-donor-cornea-exposure-to-repeat-warming-cycles-and-evaluation-times-after-implementation-of-a-rapid-warming-protocol
#11
Jameson Clover, Amy Ansin, Christopher G Stoeger, Mark A Terry, Khoa D Tran
PURPOSE: To compare tissue evaluation times and specular image quality before and after the implementation of rapid tissue warming at a single eye bank. METHODS: This retrospective study compares the evaluation of 494 donor corneas. All corneas were stored in Optisol-GS. Group 1 contained 247 corneas evaluated immediately before implementation of a tissue incubator and tissue warming protocol. Group 2 contained 247 corneas evaluated immediately after implementation...
April 4, 2018: Cornea
https://www.readbyqxmd.com/read/29516044/endothelial-cells-loss-to-the-hyperopic-pacients-during-phacoemulsification
#12
Dan-Mircea Stănilă, Andreea-Maria Florea, Adriana Stănilă, Alina Adriana Panga
Introduction: The phacoemulsification cataract surgery is the most frequently performed surgery and it generally improves vision in over 90% of the patients. Hyperopic patients are a challenge during phacoemulsification especially because of their short eyeball and shallow anterior chamber. A shallow anterior chamber is associated with overall reduction of the safe zone, which may lead to difficulty in creating the corneal incisions, harder capsulorhexis performing, or endothelial complications...
October 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29509052/comparison-of-central-corneal-thickness-with-ultrasound-pachymetry-noncontact-specular-microscopy-and-spectral-domain-optical-coherence-tomography
#13
Sevil Karaman Erdur, Goktug Demirci, Funda Dikkaya, Mehmet Selim Kocabora, Mustafa Ozsutcu
BACKGROUND: To determine the agreement of central corneal thickness (CCT) measurements taken with ultrasonic pachymetry (USP), spectral domain optical coherence tomography (SD-OCT) and noncontact specular microscopy (NSM). METHODS: A prospective, observational, cross-sectional study was performed in the outpatient ophthalmology clinic. CCT was measured in a total of 147 eyes of 147 consecutive healthy patients with USP, NSM, and SD-OCT. Same examiner performed all examinations...
March 6, 2018: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29483081/progressive-idiopathic-unilateral-corneal-endothelial-failure-of-unknown-aetiology-in-phakic-eyes
#14
Weng Hon Lee, Adrian Tey, Kevin Gales, Hardeep Singh Mudhar, Francisco C Figueiredo
AIM: To describe a cohort of patients with irreversible unilateral bullous keratopathy (BK) of undetermined aetiology. METHOD: Retrospective, single-centre case series in a tertiary corneal referral centre. RESULTS: Eleven consecutive patients (nine females; mean age 71.7 years) presented from 1999 to 2009 with acute onset unilateral visual loss. At presentation, the best-corrected visual acuity of the affected eyes was 6/9 or worse with mean central corneal thickness (CCT) of 684 (SD 66) μm...
February 26, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29432682/kinetically-controlled-formation-and-decomposition-of-metastable-bise-1-%C3%AE-m-tise-2-m-compounds
#15
Alexander C Lygo, Danielle M Hamann, Daniel B Moore, Devin R Merrill, Jeffrey Ditto, Marco Esters, Jacob Orlowicz, Suzannah R Wood, David C Johnson
Preparing homologous series of compounds allows chemists to rapidly discover new compounds with predictable structure and properties. Synthesizing compounds within such a series involves navigating a free energy landscape defined by the interactions within and between constituent atoms. Historically, synthesis approaches are typically limited to forming only the most thermodynamically stable compound under the reaction conditions. Presented here is the synthesis, via self-assembly of designed precursors, of isocompositional incommensurate layered compounds [(BiSe)1+δ ] m [TiSe2 ] m with m = 1, 2, and 3...
March 7, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29422758/localized-trichiasis-causing-focal-full-thickness-corneal-edema-endothelial-cell-loss-and-corneal-scarring-requiring-penetrating-keratoplasty
#16
Tiffany Sara Liu, Seth Meskin
The purpose of the study was to report a case of focal trichiasis causing full-thickness corneal edema, scarring, and endothelial cell loss requiring penetrating keratoplasty (PK). A 66-year-old male was referred for trichiasis of the right upper eyelid corresponding to an area of full-thickness corneal edema. No keratic precipitates or guttata was noted. Specular microscopy showed diffuse endothelial cell loss. He was treated with topical steroids and acyclovir with epilation of lashes. Anterior chamber paracentesis was negative for varicella-zoster virus, cytomegalovirus, and herpes simplex virus...
October 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/29411172/effect-of-laser-peripheral-iridotomy-using-argon-and-neodymium-yag-lasers-on-corneal-endothelial-cell-density-7-year-longitudinal-evaluation
#17
Takashi Ono, Masaharu Iida, Toshihiro Sakisaka, Keiichiro Minami, Kazunori Miyata
PURPOSE: To evaluate the changes in corneal endothelial cell density (ECD) over a 7-year period after laser peripheral iridotomy (LPI) using argon and neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers. STUDY DESIGN: Retrospective case series. METHODS: Eyes that underwent prophylactic LPI using argon and Nd:YAG lasers were followed up for 7 years. Central corneal endothelial cells were observed by use of noncontact specular microscopy preoperatively and at 1 and 7 years postoperatively...
March 2018: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29401122/corneal-endothelial-tolerance-after-iris-fixated-phakic-intraocular-lens-implantation-a-model-to-predict-endothelial-cell-survival
#18
Sabrina Chebli, Muriel Rabilloud, Carole Burillon, Viridiana Kocaba
PURPOSE: To evaluate the long-term endothelial tolerance of iris-fixated phakic intraocular lenses (pIOLs) over a 10-year period, to identify predictive factors for endothelial decompensation, and to develop a model to predict endothelial cell survival after pIOL implantation. METHODS: This retrospective study included 130 eyes in 60 patients who underwent pIOL implantation for correction of high myopia from January 2003 to October 2012 at Edouard Herriot Hospital in Lyon, France...
May 2018: Cornea
https://www.readbyqxmd.com/read/29394897/a-dose-escalation-ex-vivo-study-on-the-effects-of-intracameral-benzalkonium-chloride-in-rabbits
#19
Sergi Segarra, Marta Leiva, Daniel Costa, Natàlia Coyo, Maria Sabés-Alsina, José Ríos, Teresa Peña
BACKGROUND: Rabbits are currently not a good model for studying diseases of the corneal endothelium because their corneal endothelial cells (CECs) maintain a high proliferative capacity throughout almost all their life. Addressing this particular feature might allow the use of this species for such a purpose. The aim of this study was to evaluate the corneal endothelial injury after intracameral benzalkonium chloride (BAC) injection into rabbit eyes ex vivo, and to establish the most suitable starting dose for an in vivo study aimed at developing an animal model of corneal endothelial disease...
February 2, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29388560/pseudomorphic-gesisn-sisn-and-ge-layers-in-strained-heterostructures
#20
V A Timofeev, A I Nikiforov, A R Tuktamyshev, V I Mashanov, I D Loshkarev, A A Bloshkin, A K Gutakovskii
The GeSiSn, SiSn layer growth mechanisms on Si(100) were investigated and the kinetic diagrams of the morphological GeSiSn, SiSn film states in the temperature range of 150 °C-450 °C at the tin content from 0% to 35% were built. The phase diagram of the superstructural change on the surface of Sn grown on Si(100) in the annealing temperature range of 0 °C-850 °C was established. The specular beam oscillations were first obtained during the SiSn film growth from 150 °C to 300 °C at the Sn content up to 35%...
April 2, 2018: Nanotechnology
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