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https://www.readbyqxmd.com/read/27891366/evaluation-of-the-central-corneal-thickness-with-anterior-segment-optical-coherence-tomogram-after-penetrating-keratoplasty
#1
Anuradha Raj, Renu Dhasmana, Harsh Bahadur, Ramesh Chander Nagpal
INTRODUCTION: Graft central thickness evaluates the graft quality which affects the outcome of Penetrating Keratoplasty (PK). It varies at different point of time after PK. Anterior Segment Optical Coherence Tomography (ASOCT) can measure graft's central thickness with quite high precision. AIM: The purpose of the study was to monitor the Central Corneal thickness (CCT) with ASOCT after PK and to evaluate its relationship with the pre-operative diagnosis. MATERIALS AND METHODS: This is an observational retrospective study where records of optical PK done in December 2012 and June 2015 were reviewed...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
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/27873338/high-myopes-have-lower-normalised-corneal-tangent-moduli-less-stiff-corneas-than-low-myopes
#3
Ying Hon, Guo-Zhen Chen, Shu-Hao Lu, David C C Lam, Andrew K C Lam
PURPOSE: To compare corneal tangent moduli between low and high myopes. METHODS: Corneal hysteresis (CH) and corneal resistance factor (CRF) of 32 low and 32 high myopes were obtained using an Ocular Response Analyzer, followed by a corneal indentation device that measured corneal stiffness. Corneal topography, pachymetry, Goldmann applanation tonometry intraocular pressure (GAT-IOP), and corneal compensated intraocular pressure (IOPcc) were also obtained. Corneal tangent modulus was calculated on the basis of corneal stiffness, central corneal thickness and corneal radius...
November 21, 2016: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27837355/corneal-densitometry-and-its-correlation-with-age-pachymetry-corneal-curvature-and-refraction
#4
Nuria Garzón, Francisco Poyales, Igor Illarramendi, Javier Mendicute, Óscar Jáñez, Pedro Caro, Alfredo López, Francisco Argüeso
PURPOSE: To determine normative corneal densitometry values in relation to age, sex, refractive error, corneal thickness, and keratometry, measured using the Oculus Pentacam system. METHODS: Three hundred and thirty-eight healthy subjects (185 men; 153 women) with no corneal disease underwent an exhaustive ocular examination. Corneal densitometry was expressed in standardized grayscale units (GSU). RESULTS: The mean corneal densitometry over the total area was 16...
November 11, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27828721/change-in-central-corneal-thickness-after-the-discontinuation-of-latanoprost-in-normal-tension-glaucoma-change-in-central-corneal-thickness-after-stop-of-latanoprost
#5
Romi Yoo, Youn A Choi, Byung Joo Cho
PURPOSE: To assess the impact of latanoprost on central corneal thickness (CCT) after ceasing medication in patients with normal tension glaucoma (NTG). METHODS: A total of 46 eyes from 46 NTG patients, and 44 eyes from 44 individuals with glaucoma suspect (controls), were included in this retrospective study. Newly diagnosed early NTG patients (visual field mean deviation >-6.00) were administered latanoprost 0.005% monotherapy once a day. CCTs were measured by ultrasound pachymetry before treatment, for 5 years during treatment, and for 2 years after ceasing treatment...
November 9, 2016: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27824385/corneal-scheimpflug-densitometry-following-photorefractive-keratectomy-in-myopic-eyes
#6
Marie Boulze-Pankert, Romuald Dariel, Louis Hoffart
PURPOSE: To evaluate the modification of corneal optical densitometry following photorefractive keratectomy (PRK) using Scheimpflug topography. METHODS: Corneal densitometry (0 to 100 grayscale units [GSU]), pachymetry, and keratometry were evaluated using a rotating Scheimpflug camera (Pentacam HR; Oculus Optikgeräte, GmbH, Wetzlar, Germany) at baseline and 1 and 3 months following PRK in myopic patients. Subjective refraction, uncorrected distance visual acuity, corrected distance visual acuity, and corneal haze (0 to 4 on common subjective scale) were evaluated preoperatively at baseline, 1 month, and 3 months...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27824381/precision-of-high-resolution-oct-for-anterior-chamber-measurement-agreement-with-scheimpflug-imaging
#7
Alberto Domínguez-Vicent, Clizia Trussardi, Ulrika Wogatai, Robert Montés-Micó, Rune Brautaset
PURPOSE: To assess the precision of the new high-resolution optical coherence tomography (OCT) device to measure anterior segment distances and assess its agreement with a Scheimpflug camera. METHODS: Eighty patients with healthy and phakic eyes were included in this study, and only one eye per participant was analyzed. Each eye was measured three times with the Sirius topographer (Costruzione Strumenti Oftalmici, Florence, Italy) and the Cirrus HD-OCT 5000 (Carl Zeiss Meditec, Jena, Germany)...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27813151/consideration-of-growth-age-related-effects-on-globe-size-and-corneal-thickness-in-ovine-eyes-for-use-in-laboratory-studies
#8
Michael J Doughty
PURPOSE: The aim was to assess differences in eyeball mass, corneal diameter and central corneal thickness in slaughterhouse-procured ovine eyes. METHODS: Over a 12-year period, measurements of eye globe mass, horizontal corneal diameter and central corneal thickness were routinely undertaken within two hours post-mortem. Only eyes free of obvious mechanical damage or disease were used. RESULTS: From measurements on 736 quality-selected and trimmed eyes, globe wet mass ranged from 10...
November 3, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27800242/repeatability-and-reproducibility-of-anterior-segment-measurements-in-normal-eyes-using-dual-scheimpflug-analyzer
#9
Zeynep Altıparmak, Ramazan Yağcı, Emre Güler, Zeynel Arslanyılmaz, Metin Canbal, İbrahim F Hepşen
OBJECTIVES: To assess the repeatability and reproducibility of anterior segment measurements including aberrometric measurements provided by a dual Scheimpflug analyzer (Galilei) system in normal eyes. MATERIALS AND METHODS: Three repeated consecutive measurements were taken by two independent examiners. The following were evaluated: total corneal power and posterior corneal power, corneal higher-order wavefront aberrations (6.0 mm pupil), pachymetry at the central, paracentral, and peripheral zones, and anterior chamber depth (ACD)...
December 2015: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/27778447/distribution-of-intraocular-pressure-central-corneal-thickness-and-vertical-cup-to-disc-ratio-in-a-healthy-iranian-population-the-yazd-eye-study
#10
Mohammad Pakravan, Mohammad Ali Javadi, Shahin Yazdani, Elham Ghahari, Zohreh Behroozi, Reza Soleimanizad, Sasan Moghimi, Naveed Nilforoushan, Reza Zarei, Yadollah Eslami, Mahmood Ghassami, Hossein Ziaei, Marzieh Katibeh, Hanif Tabesh, Mehdi Yaseri
PURPOSE: To determine the distribution of intraocular pressure (IOP), central corneal thickness (CCT) and vertical cup-to-disc ratio (VCDR) in the healthy Iranian population. METHODS: This population-based, epidemiologic study evaluated Iranian aged 40-80 years, residing in Yazd, Iran, in 2010-2011. Eligible subjects were selected by cluster random sampling. Each participant underwent an interview and ophthalmologic examination including slit lamp examination, Goldmann applanation tonometry, binocular optic disc evaluation, stereoscopic fundus photography, ultrasonic pachymetry and visual field testing...
October 25, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27775234/sterile-corneal-infiltrates-after-corneal-collagen-cross-linking-evaluation-of-risk-factors
#11
Eren Çerman, Deniz Özarslan Özcan, Ebru Toker
PURPOSE: To evaluate possible risk factors leading to sterile corneal infiltrates following corneal collagen cross-linking (CXL). METHODS: A total of 588 eyes of 459 patients treated with Epi-off (n = 461) or Epi-on (n = 127) CXL were retrospectively evaluated. Risk factors, including preoperative blepharitis and vernal conjunctivitis, the postoperative use of topical non-steroidal anti-inflammatory drugs (NSAIDs), as well as Kmax and pachymetry measurements, were assessed...
October 24, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27767357/laser-vision-correction-with-q-factor-modification-for-keratoconus-management
#12
Natasha Kishore Pahuja, Rohit Shetty, Abhijit Sinha Roy, Maithil Mukesh Thakkar, Chaitra Jayadev, Rudy Mma Nuijts, Harsha Nagaraja
PURPOSE: To evaluate the outcomes of corneal laser ablation with Q factor modification for vision correction in patients with progressive keratoconus. METHODS: In this prospective study, 50 eyes of 50 patients were divided into two groups based on Q factor (>-1 in Group I and ≤-1 in Group II). All patients underwent a detailed ophthalmic examination including uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), subjective acceptance and corneal topography using the Pentacam...
October 21, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27739003/outcomes-following-implantation-of-two-second-generation-trabecular-micro-bypass-stents-in-patients-with-open-angle-glaucoma-on-one-medication-18-month-follow-up
#13
Richard Lindstrom, Richard Lewis, Dana M Hornbeak, Lilit Voskanyan, Jane Ellen Giamporcaro, John Hovanesian, Steven Sarkisian
INTRODUCTION: The study objective was to evaluate the intraocular pressure (IOP) and medication-lowering effect of 2 second-generation trabecular micro-bypass stents in eyes with open-angle glaucoma (OAG) on one preoperative medication. METHODS: Fifty-seven qualified phakic eyes with OAG on 1 medication, preoperative medicated IOP of 18-30 mmHg, and preoperative unmedicated (post-washout) IOP of 22-38 mmHg underwent implantation of 2 second-generation trabecular micro-bypass stents in a standalone procedure...
November 2016: Advances in Therapy
https://www.readbyqxmd.com/read/27722758/comparison-of-the-effect-of-epithelial-removal-by-transepithelial-phototherapeutic-keratectomy-or-manual-debridement-on-cross-linking-procedures-for-progressive-keratoconus
#14
Ronald N Gaster, J Ben Margines, David N Gaster, Xiaohui Li, Yaron S Rabinowitz
PURPOSE: To compare the visual, refractive, keratometric, topographic, and pachymetric outcomes of corneal collagen cross-linking (CXL) for progressive keratoconus following epithelial removal by transepithelial phototherapeutic keratectomy (PTK) or manual debridement. METHODS: In this analysis, 339 eyes (78% male, 22% female) that had undergone CXL following manual epithelial debridement (n = 180) or ablation via PTK (n = 159) were evaluated preoperatively and at 6, 12, and 24 months postoperatively for uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), maximum corneal keratometry, pachymetry, and spherical equivalent...
October 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27722754/transepithelial-iontophoresis-versus-standard-corneal-collagen-cross-linking-1-year-results-of-a-prospective-clinical-study
#15
Paolo Vinciguerra, Vito Romano, Pietro Rosetta, Emanuela F Legrottaglie, Raffaele Piscopo, Claudia Fabiani, Claudio Azzolini, Riccardo Vinciguerra
PURPOSE: To compare 1-year transepithelial corneal collagen cross-linking with iontophoresis (I-CXL) outcomes with standard CXL (S-CXL) epithelium-off for progressive keratoconus. METHODS: Forty eyes of 40 patients with progressive keratoconus were included in this comparative, prospective clinical study. Corrected distance visual acuity (CDVA), spherical equivalent, cylinder refraction, corneal topography, Scheimpflug tomography, aberrometry, and endothelial cell count were assessed at baseline and at 1, 3, 6, and 12 months of follow-up...
October 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27689082/efficacy-and-safety-of-lasik-combined-with-accelerated-corneal-collagen-cross-linking-for-myopia-six-month-study
#16
Ying Wu, Lei Tian, Li-Qiang Wang, Yi-Fei Huang
This was a prospective controlled clinical trial. 48 myopia patients (96 eyes) were included in this study. After LASIK, accelerated corneal collagen cross-linking (ACXL) was used for myopia treatment. During 6-month follow-up, the results of LASIK-ACXL treatment were studied and compared to the LASIK-only procedure. The results showed that no statistically significant differences in UDVA, CDVA, MRSE, K mean, pachymetry, or ECD were found between the two groups at the visit after 6 months of follow-up (all P > 0...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27688279/prevalence-of-glaucoma-in-eastern-india-the-hooghly-river-glaucoma-study
#17
Chandrima Paul, Subhrangshu Sengupta, Sumit Choudhury, Souvik Banerjee, Betsy L Sleath
CONTEXT: Glaucoma is the leading cause of global irreversible blindness. No recent study with adequate sample size has been carried out to estimate glaucoma prevalence in Eastern India. AIMS: The aim of this study was to assess and compare the prevalence and types of glaucoma in a rural and urban East Indian population. SETTINGS AND DESIGN: The Hooghly River Glaucoma Study (HRGS) is a population-based cross-sectional study from West Bengal...
August 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27672592/evaluation-of-anterior-and-posterior-surfaces-of-the-cornea-using-a-dual-scheimpflug-analyzer-in-keratoconus-patients-implanted-with-intrastromal-corneal-ring-segments
#18
Leonardo Torquetti, Carlos Arce, Jesús Merayo-Lloves, Guilherme Ferrara, Paulo Ferrara, Brenno Signorelli, Armando Signorelli
AIM: To evaluate corneal parameters measured with a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments (ICRS). METHODS: Fifty eyes of 40 keratoconus patients had Ferrara ICRS implantation from November 2010 to April 2014. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction, keratometry, asphericity, elevation, pachymetry, root mean square (RMS), spherical aberration and coma were studied...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/27668869/visual-topographic-and-pachymetric-effects-of-pediatric-corneal-collagen-cross-linking
#19
Ibrahim Toprak, Volkan Yaylali, Cem Yildirim
PURPOSE: To evaluate the effects of pediatric corneal collagen cross-linking (CXL) on corrected distance visual acuity (CDVA), maximum keratometry (Kmax), and other Scheimpflug imaging system parameters during 2 years of follow-up. METHODS: The records of 29 eyes of 29 pediatric patients who underwent unilateral CXL treatment for progressive keratoconus were reviewed. Changes in CDVA, Kmax, anterior chamber depth, anterior chamber volume, anterior chamber angle, pupil-center pachymetry, apical pachymetry, thinnest pachymetry, corneal volume, and topographic indices (index of surface variance [ISV], index of vertical asymmetry [IVA], index of height asymmetry [IHA], keratoconus index [KI], center keratoconus index [CKI], index of height decentration [IHD], and minimum radius of curvature [Rmin]) were analyzed among baseline and 1 and 2 years after the CXL treatment...
September 26, 2016: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27661069/two-year-refractive-outcomes-after-descemet-membrane-endothelial-keratoplasty
#20
Korine van Dijk, Marina Rodriguez-Calvo-de-Mora, Hilde van Esch, Laurence Frank, Isabel Dapena, Lamis Baydoun, Silke Oellerich, Gerrit R J Melles
PURPOSE: To monitor refractive changes after Descemet membrane endothelial keratoplasty (DMEK) and to determine what may influence these changes and the time point of stabilization. METHODS: From 67 pseudophakic DMEK eyes operated on for Fuchs endothelial dystrophy at a tertiary referral center, biomicroscopy, visual acuity, subjective refraction, and Scheimpflug-based corneal tomography data were obtained before and up to 2 years postoperatively. Visual acuity and changes in spherical equivalent (SE), mean anterior and posterior simulated keratometry (Km), and central pachymetry were analyzed...
September 21, 2016: Cornea
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