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Keratoconus

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https://www.readbyqxmd.com/read/29335104/vision-related-quality-of-life-and-dependency-in-french-keratoconus-patients-impact-study
#1
Valentine Saunier, Audrey-Elodie Mercier, Thibaut Gaboriau, Florence Malet, Joseph Colin, Pierre Fournié, François Malecaze, David Touboul
PURPOSE: To assess the quality of life in French keratoconus patients. SETTING: Fifty-seven Keratoconus National Reference Centers across France. DESIGN: Prospective case series. METHODS: Patients completed the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) and a French validated questionnaire on disability and dependency from February to June 2012 when they came for an ophthalmic examination at 57 participating centers across France...
December 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29333909/subclinical-inflammatory-response-accelerated-versus-standard-corneal-cross-linking
#2
Alireza Hedayatfar, Hassan Hashemi, Gholamhossein Aghaei, Nahid Ashraf, Soheila Asgari
PURPOSE: To compare the subclinical inflammatory response (as measured by anterior chamber flare) induced after standard (3 mW/cm2, 30 min) and accelerated (18 mW/cm2, 5 min) corneal cross-linking (CXL). METHODS: In this comparative, non-randomized study, patients with progressive keratoconus who underwent standard or accelerated CXL were studied. Laser flare photometery (FM-600; Kowa, Tokyo, Japan) was used to measure anterior chamber flare preoperatively and at 1 week, 1 month, 3 months, and 6 months after the procedure...
January 15, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29325388/-the-research-advances-of-microrna-184-and-related-ocular-diseases
#3
R R Zong, Y P Zhou, Z G Liu
microRNA-184 (miR-184) is a small, non-coding, endogenic RNA molecule of 22 nucleotides in length. It is a highly conserved sequence throughout many different species. Multiple studies have demonstrated that miR-184 is an important factor in regulating gene expression at the post-transcriptional level. miR-184 plays vital roles in many biological processes, including development and differentiation in many tissues and organs. Meanwhile, the research on the physiological and pathological role of miR-184 in eyes draws more and more attention lately...
December 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29321650/rna-seq-analysis-and-comparison-of-corneal-epithelium-in-keratoconus-and-myopia-patients
#4
Jingjing You, Susan M Corley, Li Wen, Chris Hodge, Roland Höllhumer, Michele C Madigan, Marc R Wilkins, Gerard Sutton
Keratoconus is a common degenerative corneal disease that can lead to significant visual morbidity, and both genetic and environmental factors have been implicated in its pathogenesis. We compared the transcriptome of keratoconus and control epithelium using RNA-Seq. Epithelial tissues were obtained prior to surgery from keratoconus and myopia control patients, undergoing collagen cross-linking and photorefractive keratectomy, respectively. We identified major differences in keratoconus linked to cell-cell communication, cell signalling and cellular metabolism...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319598/corneal-collagen-cross-linking-with-riboflavin-and-ultraviolet-a-light-for-pediatric-keratoconus-ten-year-results
#5
Cosimo Mazzotta, Claudio Traversi, Stefano Baiocchi, Simone Bagaglia, Orsola Caporossi, Antonio Villano, Aldo Caporossi
PURPOSE: To assess the 10-year follow-up efficacy and safety of riboflavin ultraviolet A-induced cross-linking (CXL) in a population of pediatric patients aged 18 years and younger with progressive keratoconus (KC). METHODS: The prospective longitudinal cohort study included 62 eyes of 47 keratoconic patients undergoing epithelium-off CXL who completed 10-year follow-up. The surgical procedure was performed in all patients according to the Siena (Dresden modified) protocol...
January 9, 2018: Cornea
https://www.readbyqxmd.com/read/29319597/repeated-same-day-versus-single-tomography-measurements-of-keratoconic-eyes-for-analysis-of-disease-progression
#6
Wolf Wonneberger, Bertil Sterner, Ulrika MacLean, Margareta Claesson, Madeleine Zetterberg
PURPOSE: Corneal tomography is used to assess progression of keratoconus and to direct clinical decisions regarding corneal cross-linking. The purpose of this study was to analyze the variability of repeated Scheimpflug-tomography (Pentacam Classic; Oculus, Wetzlar, Germany) measurements of keratoconic eyes in a clinical setting and to assess the validity of such measurements as a clinical decision-making tool. METHODS: Eighty keratoconic eyes of 45 patients (age range 16-32 years) were examined at baseline and after follow-up periods of 3 to 6 months using 3 consecutive tomography measurements at each visit...
January 9, 2018: Cornea
https://www.readbyqxmd.com/read/29319596/obstructive-sleep-apnea-assessed-by-overnight-polysomnography-in-patients-with-keratoconus
#7
Emilio Pedrotti, Christian Luigi Demasi, Adriano Fasolo, Erika Bonacci, Tommaso Brighenti, Nicola Gennaro, Marcello Ferrari, Giorgio Marchini
PURPOSE: To determine the prevalence of obstructive sleep apnea (OSA) in patients with keratoconus (KCN) and to evaluate the association between the severity of KCN and OSA. METHODS: OSA was diagnosed with an overnight home sleep apnea test. As estimated by home monitoring, an apnea-hypopnea index threshold of ≥5 sleep-related obstructive breathing events per hour was considered suggestive of OSA. For grading KCN severity (Amsler-Krumeich classification), slit-lamp biomicroscopy, corneal topography, and pachymetry measurements were performed...
January 9, 2018: Cornea
https://www.readbyqxmd.com/read/29318768/use-of-instrumented-indentation-for-determination-of-mechanical-properties-of-human-cornea-after-uva-crosslinking
#8
Jiri Nohava, Michael Swain, Stefan J Lang, Philip Maier, Sonja Heinzelmann, Thomas Reinhard, Philipp Eberwein
UVA-crosslinking is used for treatment of corneal diseases such as keratoconus in order to stabilize the corneal tissue by crosslinking of the collagen fibers. It has been shown that the crosslinking treatment leads to a stiffening of the central corneal tissue. However, knowledge of lateral extent of the corneal stiffening as well as a systematic study of the mechanical response of human cornea is still missing. In our study we measured the stiffness (elastic modulus) of the anterior surface of healthy and crosslinked human corneas by instrumented indentation using a spherical indenter...
January 10, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29315446/erratum-for-in-vivo-early-corneal-biomechanical-changes-after-corneal-cross-linking-in-patients-with-progressive-keratoconus
#9
(no author information available yet)
No abstract text is available yet for this article.
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29315440/femtosecond-laser-assisted-stromal-lenticule-addition-keratoplasty-for-the-treatment-of-advanced-keratoconus-a-preliminary-study
#10
Leonardo Mastropasqua, Mario Nubile, Niccolò Salgari, Rodolfo Mastropasqua
PURPOSE: To investigate the in vivo effect of a novel femtosecond laser-assisted procedure termed stromal lenticule addition keratoplasty for advanced keratoconus. METHODS: Ten patients with stage III and IV stable keratoconus were included. Negative meniscus-shaped stromal lenticules were produced from corneoscleral eye bank buttons with a refractive lenticule extraction procedure with a 500-kHz VisuMax femtosecond laser (Carl Zeiss Meditec, Jena, Germany). Recipient corneas underwent a modified femtosecond laser flap-cut procedure to produce an intrastromal pocket and lenticules were implanted...
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29315439/autorefraction-versus-manifest-refraction-in-patients-with-keratoconus
#11
Nienke Soeters, Marc B Muijzer, Jurrian Molenaar, Daniel A Godefrooij, Robert P L Wisse
PURPOSE: To compare visual performance using autorefraction and manifest refraction assessments in patients with keratoconus and investigate whether autorefraction measurements lead to suboptimal visual performance. METHODS: Corrected distance visual acuity (CDVA) was measured in 90 eyes of 61 patients with keratoconus with both autorefraction and manifest refraction, in a random order. Maximum keratometry (Kmax), cone location, and wavefront aberration were determined with Scheimpflug tomography...
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29308960/collagen-cross-linking-in-the-management-of-microbial-keratitis
#12
Chiara Bonzano, Antonio Di Zazzo, Stefano Barabino, Giulia Coco, Carlo Enrico Traverso
Increasing resistance to antimicrobial agents has contributed to an elevated risk of complications of infectious keratitis. Corneal collagen cross-linking (CXL) has been widely adopted for the management of keratoconus and post-refractive surgery corneal ectasia. It has recently been introduced as an option for treating keratitis due to multidrug resistant organisms. The purpose of this review is to discuss the rationale, safety, and evidence for CXL in infectious keratitis and its possible effect on ocular surface inflammation...
January 8, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29301767/avoiding-big-bubble-complications-outcomes-of-layer-by-layer-deep-anterior-lamellar-keratoplasty-in-children
#13
Uri Elbaz, Caitriona Kirwan, Carl Shen, Asim Ali
BACKGROUND/AIMS: To describe the visual and clinical outcomes of manual layer-by-layer deep anterior lamellar keratoplasty (DALK) in a paediatric population. METHODS: The charts of all children who underwent DALK surgery between January 2007 and January 2015 were reviewed retrospectively. Data collected included preoperative and postoperative spectacle-corrected distance visual acuity (CDVA), intraoperative and postoperative complications including graft rejection and failure...
January 4, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29300266/visibility-and-depth-of-the-stromal-demarcation-line-after-corneal-collagen-cross-linking-using-anterior-segment-optical-coherence-tomography-comparison-between-isoosmolar-and-hypoosmolar-riboflavin
#14
Louis Lhuillier, Cedric Ghetemme, Mathilde Boiché, Rekia Yahia, Naila Houmad, Mohamed Zaidi, Christophe Goetz, Jean Marc Perone
PURPOSE: To evaluate and compare visibility and depth of the stromal demarcation line (DL) created after corneal collagen cross-linking (CXL) using anterior segment optical coherence tomography (AS-OCT) between 2 groups: CXL with isoosmolar and hypoosmolar riboflavin. METHODS: In this retrospective study performed at Metz-Thionville Regional Hospital, consecutive patients with progressive keratoconus underwent CXL using an accelerated protocol (10 min, 9 mW/cm ultraviolet-A)...
January 3, 2018: Cornea
https://www.readbyqxmd.com/read/29298777/prevalence-of-keratoconus-in-paediatric-patients-in-riyadh-saudi-arabia
#15
Emilio Almeida Torres Netto, Wafa Majed Al-Otaibi, Nikki L Hafezi, Sabine Kling, Haya M Al-Farhan, J Bradley Randleman, Farhad Hafezi
BACKGROUND/AIM: Keratoconus (KC) is a ectatic corneal disorder with marked progression during childhood and puberty that may lead to severe visual loss. In addition to KC prevalence, estimate shows major geographical variations; recent studies using Scheimpflug technology are in contrast to the 1980s and 1990s literature. The present study aims to determine the prevalence of KC in paediatric patients in Riyadh, Saudi Arabia (KSA). METHODS: This prospective, cross-sectional, observational, multicentre study collected data from paediatric patients from 6 years and 21 years of age who were seen at multiple non-ophthalmic emergency departments within KSA...
January 3, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29296550/comparison-of-transepithelial-corneal-crosslinking-with-epithelium-off-crosslinking-epithelium-off-cxl-in-adult-pakistani-population-with-progressive-keratoconus
#16
Bushra Akbar, Rana Intisar-Ul-Haq, Mazhar Ishaq, Ayesha Fawad, Sabahat Arzoo, Kashif Siddique
PURPOSE: The purpose of this study is to compare the safety and efficacy of transepithelial corneal crosslinking (CXL) with epithelium-off crosslinking (epithelium-off CXL) in the treatment of progressive keratoconus in adult Pakistani population. MATERIALS AND METHODS: Sixty-four eyes of 64 consecutive patients of progressive keratoconus were included in this quasi-experimental study. Thirty-two eyes received transepithelial CXL with Peschke TE (0.25% riboflavin (Vitamin B2), 1...
October 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/29284455/visual-rehabilitation-in-moderate-keratoconus-combined-corneal-wavefront-guided-transepithelial-photorefractive-keratectomy-and-high-fluence-accelerated-corneal-collagen-cross-linking-after-intracorneal-ring-segment-implantation
#17
Hun Lee, David Sung Yong Kang, Byoung Jin Ha, Jin Young Choi, Eung Kweon Kim, Kyoung Yul Seo, Tae-Im Kim
BACKGROUND: To investigate the effects of combined corneal wavefront-guided transepithelial photorefractive keratectomy (tPRK) and accelerated corneal collagen cross-linking (CXL) after intracorneal ring segment (ICRS) implantation in patients with moderate keratoconus. METHODS: Medical records of 23 eyes of 23 patients undergoing combined tPRK and CXL after ICRS implantation were retrospectively analyzed. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction spherical equivalent (MRSE), corneal indices based on Scheimpflug tomography, higher-order aberrations (HOAs), and corneal biomechanical properties were evaluated before and after ICRS implantation, and at 1, 3, and 6 months after combined tPRK and CXL...
December 29, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29283924/comparison-of-changes-in-central-corneal-thickness-during-corneal-collagen-cross-linking-using-isotonic-riboflavin-solutions-with-and-without-dextran-in-the-treatment-of-progressive-keratoconus
#18
Naima Zaheer, Wajid Ali Khan, Shama Khan, M Abdul Moqeet Khan
PURPOSE: To compare intraoperative changes in central corneal thickness (CCT) during corneal cross-linking, using 2 different isotonic riboflavin solutions either with dextran or with hydroxy propyl methylcellulose, in the treatment of progressive keratoconus. METHODS: In this retrospective study, we analyzed records of corneal thickness measurements, taken during various steps of cross-linking. Cross-linking was performed using either isotonic riboflavin with dextran (group A) or isotonic riboflavin with hydroxy propyl methylcellulose (without dextran) (group B)...
December 27, 2017: Cornea
https://www.readbyqxmd.com/read/29282020/efficacy-and-safety-of-transepithelial-corneal-collagen-crosslinking-surgery-versus-standard-corneal-collagen-crosslinking-surgery-for-keratoconus-a-meta-analysis-of-randomized-controlled-trials
#19
Wenwei Li, Bin Wang
BACKGROUND: The aim of this study was to evaluate the efficacy and safety of transepithelial corneal collagen crosslinking (transepithelial CXL) versus standard corneal collagen crosslinking (epithelium-off CXL) on keratoconus. METHODS: Eligible studies were identified by systematically searching PubMed, the Cochrane Library and Embase. Topographic parameters, corrected distant visual acuity (CDVA), uncorrected distant visual acuity (UDVA), and corneal thickness (CT) were assessed by the pooled weighted mean differences (WMDs) of the change from baseline to the end of follow up...
December 28, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29279651/mesopic-quality-of-vision-after-accelerated-18-mw-cm2-corneal-cross-linking-mid-term-results
#20
Hassan Hashemi, Mohammad Miraftab, Soheila Asgari
PURPOSE: The purpose of the study was to determine 2-year changes in mesopic higher-order aberrations (HOAs) and contrast sensitivity (CS) after accelerated corneal cross-linking (CXL) in keratoconus patients. MATERIALS AND METHODS: In this before-after interventional case series, patients with progressive keratoconus were subjected to accelerated CXL (18 mW/cm2, 5 min). Patients were examined with the OPD-Scan III and CVS-1000 grating charts under mesopic conditions at baseline and at 12 and 24 months after CXL...
July 2017: Middle East African Journal of Ophthalmology
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