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Corneal cross-linking

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https://www.readbyqxmd.com/read/29160595/advanced-anterior-segment-imaging-in-keratoconus-a-review
#1
REVIEW
Akilesh Gokul, Hans R Vellara, Dipika V Patel
Advances in anterior segment imaging have enhanced our ability to detect keratoconus in its early stages and characterise the pathologic changes that occur. Computerised corneal tomography has elucidated the alterations in shape of the anterior and posterior corneal surfaces and alterations in thickness as the disease progresses. Automated screening indices such as the keratoconus screening index were developed to assist in detecting keratoconus in suspicious cases. In vivo assessment of keratoconic corneas has revealed that compromised corneal biomechanics can now be measured clinically...
November 21, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29142546/comparison-of-analgesic-effect-of-preoperative-topical-diclofenac-versus-ketorolac-on-postoperative-pain-after-corneal-collagen-cross-linkage
#2
Murtaza Sameen, Muhammad Saim Khan, Asad Habib, Muhammad Amer Yaqub, Mazhar Ishaq
Objective: To compare post-operative pain relieving effect of topical diclofenac 0.1% versus ketorolac 0.5% in Corneal Collagen Cross Linking (CXL) for patients diagnosed with keratoconus. Methods: This randomized controlled trial was carried out for six months from October 2016 to March 2017. We included young patients having keratoconus with k-readings greater than 47D and central corneal thickness more than 400 microns. All the patients received single dose one drop of topical diclofenac 0...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29140861/sealing-of-corneal-lacerations-using-photoactivated-rose-bengal-dye-and-amniotic-membrane
#3
Timothy A Soeken, Hong Zhu, Sheri DeMartelaere, Brett W Davies, Mirang Kim, Heuy-Ching Wang, James Aden, Rose Grimm, Clemens Alt, Irene E Kochevar, Anthony J Johnson
PURPOSE: Watertight closure of perforating corneoscleral lacerations is necessary to prevent epithelial ingrowth, infection, and potential loss of the eye. Complex lacerations can be difficult to treat, and repair with sutures alone is often inadequate. In this study, we evaluated a potentially sutureless technology for sealing complex corneal and scleral lacerations that bonds the amniotic membrane (AM) to the wound using only green light and rose bengal dye. METHODS: The AM was impregnated with rose bengal and then sealed over lacerations using green light to bond the AM to the deepithelialized corneal surface...
November 14, 2017: Cornea
https://www.readbyqxmd.com/read/29128534/development-of-gelatin-ascorbic-acid-cryogels-for-potential-use-in-corneal-stromal-tissue-engineering
#4
Li-Jyuan Luo, Jui-Yang Lai, Shih-Feng Chou, Yi-Jen Hsueh, David Hui-Kang Ma
To offer an ideal hospitable environment for corneal keratocyte growth, the carrier materials can be functionalized with incorporation of signaling molecules to regulate cell biological events. This study reports, for the first time, the development of gelatin/ascorbic acid (AA) cryogels for keratocyte carriers in vitro and in vivo. The cryogel samples were fabricated by blending of gelatin with varying amounts of AA (0-300 mg) and carbodiimide cross-linking via cryogelation technique. Hydrophilic AA content in the carriers was found to significantly affect cross-linking degree and pore dimension of cryogels, thereby dictating their mechanical and biological stability and AA release profile...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29123375/sequential-keraring-implantation-and-corneal-cross-linking-for-the-treatment-of-keratoconus-in-children-with-vernal-keratoconjunctivitis
#5
Mortada A Abozaid
Purpose: The purpose of this study was to assess the safety and efficacy of femtosecond laser-assisted Keraring implantation followed by transepithelial accelerated corneal collagen cross-linking (CXL) for the treatment of keratoconus in children with vernal keratoconjunctivitis (VKC). Study design: This is a prospective interventional non-comparative case series. Patients and methods: Eighteen eyes of 11 children with keratoconus and VKC were included in this study...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29118708/corneal-collagen-cross-linking-combined-with-an-artiflex-iris-fixated-anterior-chamber-phakic-intraocular-lens-implantation-in-a-patient-with-progressive-keratoconus
#6
Sharif Hashmani, Nauman Hashmani, Roha Saeed Memon
We present here the case of a 24-year-old male who experienced progressive keratoconus and vision loss which adversely affected his ability to carry out everyday tasks. This landed him in the Hashmanis Hospital for consultation. He had a preoperative best corrected visual acuity of 6/12. He underwent multiple Oculus Pentacam examinations, which showed progressive keratoconus. Corneal collagen cross-linking (CXL) was performed to stabilize his cornea and, subsequently, an Artiflex anterior chamber iris-fixated phakic intraocular lens (ACIF-PIOL) was implanted to alleviate his refractive errors...
September 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29117418/keratoconus-screening-with-dynamic-biomechanical-in-vivo-scheimpflug-analyses-a-proof-of-concept-study
#7
Johannes Steinberg, Nazanin Eslami Amirabadi, Andreas Frings, Juliane Mehlan, Toam Katz, Stephan J Linke
PURPOSE: This proof-of-concept study was designed to analyze the ability of in vivo biomechanical corneal analyses with the corneal visualization Scheimpflug technology (CorvisST; Oculus Optikgeräte, Wetzlar, Germany) to differentiate between normal eyes and eyes with manifest keratoconus after strictly eliminating the potential confounding factors intraocular pressure (IOP) and central corneal thickness (CCT). METHODS: In this retrospective, cross-sectional study, after pairwise matching for CCT and IOP, 29 normal eyes and 29 keratoconic eyes (one eye from each patient) were selected as study population...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29117410/corneal-cross-linking-cxl-standardizing-terminology-and-protocol-nomenclature
#8
EDITORIAL
J Bradley Randleman, Marcony R Santhiago, George D Kymionis, Farhad Hafezi
No abstract text is available yet for this article.
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29116549/transepithelial-accelerated-corneal-collagen-cross-linking-with-higher-oxygen-availability-for-keratoconus-1-year-results
#9
Ling Sun, Meng Li, Xiaoyu Zhang, Mi Tian, Tian Han, Jing Zhao, Xingtao Zhou
PURPOSE: To investigate the safety and efficacy of a new protocol for transepithelial accelerated corneal collagen cross-linking with higher oxygen availability for keratoconus treatment. METHODS: There were 26 patients (26 eyes) diagnosed with keratoconus enrolled in the study and treated with transepithelial accelerated corneal collagen cross-linking. The corneas were irradiated using UVA light for 5 min and 20 s with 45 mW/cm(2) irradiance and pulsed illumination (1:1)...
November 7, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29111996/microbial-keratitis-after-accelerated-corneal-collagen-cross-linking-in-keratoconus
#10
Prafulla K Maharana, Pranita Sahay, M Sujeeth, Deepali Singhal, Anubha Rathi, Jeewan S Titiyal, Namrata Sharma
PURPOSE: To assess the pattern of microbial keratitis after accelerated corneal collagen cross-linkage (aCXL) in patients with keratoconus. METHOD: The medical records of cases of keratoconus that underwent aCXL from June 2014 to May 2017 were reviewed. Cases that developed microbial keratitis after aCXL were included in the study. The clinical, microbiological profile and the treatment outcomes were evaluated. RESULTS: Of 532 eyes that underwent aCXL, 7 cases developed microbial keratitis during the study period...
November 2, 2017: Cornea
https://www.readbyqxmd.com/read/29111836/long-term-changes-in-backscattered-light-measurements-in-keratoconus-corneas-treated-with-collagen-cross-linking
#11
Gabor Nemeth, Jasmin Hassan, Laszlo Modis, Ziad Hassan
PURPOSE: Our aim was to compare densitometry data between keratoconus and normal corneas and to assess the long-term changes in corneal backscattered light values after corneal collagen cross-linking (CXL) treatment. MATERIAL AND METHODS: Retrospective analysis was performed on 26 eyes of normal patients (age: 32.71 ± 12.68 years) and 39 eyes of keratoconus patients (28.93 ± 7.59 years) using the Pentacam HR corneal densitometry module before CXL and during the postoperative period, which lasted a mean of 2...
November 7, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29110439/iontophoretic-collagen-cross-linking-versus-epithelium-off-collagen-cross-linking-for-early-stage-of-progressive-keratoconus-3%C3%A2-years-follow-up-study
#12
Alina Cantemir, Anisia-Iuliana Alexa, Bogdan Gabriel Galan, Nicoleta Anton, Roxana Elena Ciuntu, Ciprian Danielescu, Dorin Chiselita, Danut Costin
PURPOSE: To compare 3-year iontophoretic corneal collagen cross-linking (I-CXL) outcomes with epithelium-off corneal collagen cross-linking (epi-off CXL) for early stage of progressive keratoconus. METHODS: Eighty eyes of 80 patients with early progressive keratoconus treated by I-CXL (n = 40) or epi-off CXL (n = 40) were included in this study. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, corneal topography and pachymetry were assessed at baseline and at 1, 3, 6, 12, 24 and 36 months of follow-up...
November 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29095506/subacute-effects-of-rose-bengal-green-light-cross-linking-on-rabbit-thin-corneal-stability-and-safety
#13
Ti Wang, Lu Zhu, Jingyin Zhu, Yinbo Peng, Nianci Shen, Yan Yu, Min Yao
BACKGROUND AND PURPOSE: The purpose of this study was to investigate the subacute effects of Rose Bengal (RB) and 532 nm green light-induced photochemical crosslinking (RB-PCL) on rabbit thin corneal stability and safety in vivo. MATERIALS AND METHODS: Rabbit thin corneal models with 250 μm thickness were created by photorefractive keratectomy surgery. Photochemical crosslinking with green light (wavelength 532 nm) at an illumination intensity of 0.4 W/cm(2) for 250 s (100 J/cm(2) ) was performed, followed by antibiotic treatment and slit lamp monitoring for four weeks...
November 2, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29081866/conventional-versus-accelerated-collagen-cross-linking-for-keratoconus-a-comparison-of-visual-refractive-topographic-and-biomechanical-outcomes
#14
Jyh Haur Woo, Jayant Venkatramani Iyer, Li Lim, M Htoon Hla, Jodhbir S Mehta, Cordelia Ml Chan, Donald Th Tan
OBJECTIVE: The aim was to compare the visual, refractive, topographic and biomechanical outcomes in patients with progressive keratoconus treated with either conventional or accelerated crosslinking at one year follow up. METHODS: It is a prospective, non-randomised interventional study of 76 patients who underwent conventional (CXL; 3mW/cm(2) for 30 minutes) or accelerated cross linking (KXL; 30mW/cm(2) for 4 minutes) for progressive keratoconus. Baseline and postoperative visual acuity, manifest refraction, corneal topography, pachymetry, endothelial cell density and biomechanical parameters of corneal hysteresis and corneal resistance factor were evaluated and compared...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/29067107/conventional-vs-pulsed-light-accelerated-corneal-collagen-cross-linking-for-the-treatment-of-progressive-keratoconus-12-month-results-from-a-prospective-study
#15
Liang-Zhu Jiang, Wei Jiang, Shi-Yan Qiu
The aim of the present study was to compare the clinical outcomes of conventional corneal collagen cross-linking (CXL) and pulsed-light accelerated CXL (pl-ACXL) in the eyes of patients with progressive keratoconus. A total of 72 eyes with progressive keratoconus in 58 patients were equally divided into the CXL and pl-ACXL treatment groups. The CXL treatment was performed using the UVX 1000 system with 0.1% riboflavin solution in 20% dextran presoak for 30 min, and 3 mW/cm(2) ultraviolet A (UVA) light for 30 min...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29060143/noninvasive-evaluation-of-corneal-viscoelasticity-based-on-displacement-in-response-to-acoustic-radiation-force
#16
Zhen Lv, Qing-Min Wang, Fu-Long Liu, Peng-Peng Zhang, Xue-Hua Gao, Yanrong Guo, Xin-Yu Zhang
Noninvasive assessment of corneal mechanical properties in vivo will help to the understanding of the pathogenesis and early diagnosis of ectatic corneal disorders. This study presented a noninvasive method that assesses the corneal biomechanical properties by exciting the cornea with acoustic radiation force and monitoring its displacement using a dual-frequency confocal transducer. A 3.85-MHz pushing element was used to induce localized tissue displacement, and the displacement was detected by the 12.8-MHz detecting elements using pulse-echo methods...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29051516/stromal-striae-a-new-insight-into-corneal-physiology-and-mechanics
#17
Kate Grieve, Djida Ghoubay, Cristina Georgeon, Gael Latour, Amir Nahas, Karsten Plamann, Caroline Crotti, Romain Bocheux, Marie Borderie, Thu-Mai Nguyen, Felipe Andreiuolo, Marie-Claire Schanne-Klein, Vincent Borderie
We uncover the significance of a previously unappreciated structural feature in corneal stroma, important to its biomechanics. Vogt striae are a known clinical indicator of keratoconus, and consist of dark, vertical lines crossing the corneal depth. However we detected stromal striae in most corneas, not only keratoconus. We observed striae with multiple imaging modalities in 82% of 118 human corneas, with pathology-specific differences. Striae generally depart from anchor points at Descemet's membrane in the posterior stroma obliquely in a V-shape, whereas in keratoconus, striae depart vertically from posterior toward anterior stroma...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29043533/corneal-cross-linking-has-no-effect-on-matrix-metalloproteinase-9-and-13-levels-during-fungal-keratitis-on-the-early-stage
#18
Ayse Kalkanci, Kamil Bilgihan, Huseyin Baran Ozdemir, Atiye Seda Yar Saglam, Funda Karakurt, Merve Erdogan
The aim of our study was to investigate matrix metalloproteinases, MMP-9 and MMP-13 levels, in the rabbit model of Fusarium and Candida keratitis treated by corneal cross-linking (PACK-CXL). Rabbit corneas were inoculated with fungal inoculum for keratitis. Each group divided into four subgroups, including un-treated group, PACK-CXL group, voriconazole group and PACK-CXL plus voriconazole group. PACK-CXL was applied with 0.25% riboflavin in accelerated Dresden protocol, and 0.1% voriconazole drops were administered...
October 17, 2017: Mycopathologia
https://www.readbyqxmd.com/read/29042747/high-resolution-wavefront-guided-surface-ablation-with-corneal-cross-linking-in-ectatic-corneas-a-pilot-study
#19
Gustavo E Tamayo, Claudia Castell, Pilar Vargas, Eduardo Polania, Juliana Tamayo
PURPOSE: A preliminary study to evaluate the outcomes of high-resolution wavefront-guided (HRWG) photorefractive keratectomy (PRK) with simultaneous corneal cross-linking (CXL) in ectasia eyes. METHODS: Sixteen eyes of 11 patients (mean age 31.9±9.8 years; range: 15-48 years) with keratoconus or post-laser-assisted in situ keratomileusis ectasia underwent HRWG PRK with simultaneous CXL. Manifest refraction, uncorrected (UDVA) and corrected distance visual acuity (CDVA), and keratometric and aberrometric outcomes are reported at 12 months...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29032110/use-of-donors-predisposed-by-corneal-collagen-cross-linking-in-penetrating-keratoplasty-for-treating-the-patients-with-keratoconus
#20
Ting Huang, Ruifen Ye, Chen Ouyang, Chao Hou, Yunwei Hu, Qianni Wu
PURPOSE: To investigate whether use of donors predisposed by corneal collagen cross-linking (CXL) reduced myopic refractive errors for keratoconic eyes after penetrating keratoplasty (PK). DESIGN: Randomized controlled trial. METHODS: One hundred sixteen eyes of 116 patients with keratoconus from Zhongshan Ophthalmic Center were enrolled. Using stratified block randomization, eligible eyes were assigned to CXL graft group (Group1) or conventional graft group (Group2)...
October 12, 2017: American Journal of Ophthalmology
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