keyword
MENU ▼
Read by QxMD icon Read
search

Cornea keratoconus refractive

keyword
https://www.readbyqxmd.com/read/27910295/combined-application-of-prophylactic-corneal-cross-linking-and-laser-in-situ-keratomileusis-a-review-of-literature
#1
REVIEW
Tommy C Y Chan, Alex L K Ng, Karen K W Chan, George P M Cheng, Ian Y H Wong, Vishal Jhanji
Laser in-situ keratomileusis (LASIK) is safe and effective laser refractive procedures in treating refractive errors. However, regression of treatment and iatrogenic keratectasia remain to be a major concern, especially in treating thin cornea with high ametropia. Collagen cross-linking (CXL) is an effective method in stopping keratoconus progression through increasing the biomechanical strength of the cornea. Adjuvant cross-linking to refractive procedures can theoretically help prevent regression and reduce the risk of keratectasia development by increasing the mechanical stability of cornea...
December 2, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27897442/pupillary-offset-in-keratoconus-and-its-relationship-with-clinical-and-topographical-features
#2
Gozde Hondur, Nurullah Cagil, Ozge Sarac, Meltem Ece Ozcan, Pinar Kosekahya
PURPOSE: To evaluate the change in the location of pupillary center with corneal tomography in keratoconic patients, and determine the correlation of pupillary offset with clinical and topographical features of keratoconus. METHODS: Ninety-one eyes of the 54 patients with keratoconus in different stages and 39 eyes of 39 refractive surgery candidates with normal corneas were included in our study. Ocular aberrations and the pupillary offset parameters (x-offset and y-offset) over a 5 mm (undilated) pupil were measured with a Sirius corneal tomographer...
November 29, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27804048/clinical-evaluation-of-two-types-of-intracorneal-ring-segments-icrs-for-keratoconus
#3
Waleed S Al-Tuwairqi, Uchechukwu L Osuagwu, Haya Razzouk, Ahmed AlHarbi, Kelechi C Ogbuehi
PURPOSE: To compare the outcome measures following implantation of two types of ICRS. METHODS: Forty-four eyes of keratoconic patients (aged 18-50 years) were randomly assigned to femtosecond laser-assisted Keraring ICRS (Group A) or MyoRing (Group B) implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, keratometry (K), and aberrations were compared preoperatively, at 3 and 6 months postoperatively. A survey was conducted to assess patient's satisfaction, 6 months postoperatively...
November 1, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27732724/differential-molecular-expression-of-extracellular-matrix-and-inflammatory-genes-at-the-corneal-cone-apex-drives-focal-weakening-in-keratoconus
#4
Natasha Pahuja, Nimisha R Kumar, Rushad Shroff, Rohit Shetty, Rudy M M A Nuijts, Anuprita Ghosh, Abhijit Sinha-Roy, Shyam S Chaurasia, Rajiv R Mohan, Arkasubhra Ghosh
Purpose: In this study, we elucidated the differential expression of a set of local molecular factors in ectatic cone area of the cornea to uncover a functional cause for focal corneal weakening characteristic of the keratoconus (KC) disease. Methods: All human corneal samples were collected after approval of Institutional Ethics Committee and informed consent. Keratoconus patients were classified based on clinical parameters, topographical features, and structural deformity...
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27679531/common-eye-diseases-in-children-in-saudi-arabia-jazan
#5
Abdulrahman Darraj, Walid Barakat, Mona Kenani, Reem Shajry, Abdullah Khawaji, Sultan Bakri, Abdulrahman Makin, Azza Mohanna, Abu Obaida Yassin
BACKGROUND: The rise in childhood eye diseases has become a matter of concern in Saudi Arabia, and hence a study has been conducted on the residents of Jazan. The aim of the research was to find out the root cause of such issues and provide a solution to prevent such circumstances for it may affect the vision of children. In this study, therefore, we aimed to determine the types of childhood eye diseases in Jazan and to discuss the best ways to prevent them or prevent their effect on the vision of our children...
2016: Ophthalmology and Eye Diseases
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
#6
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/27647247/-corneal-biomechanical-properties-in-keratoconic-and-normal-eyes
#7
S S Wei, Y Li, J Li, J G Liu, L Ye, Y Q Wan, J Li, J Du
Objective: To compare the corneal biomechanical properties of keratoconic and normal eyes, and to explore the changing characteristics in keratoconic eyes. Methods: Case-control study. Thirty-two keratoconic subjects(41 eyes)and 41 subjects(41 eyes)with normal corneas were enrolled in this study. Scheimpflug noncontact tonometry(Corvis ST)was performed to measure the length of Appl 1(1st A length), velocity of Appl 1(Vin), length of Appl 2(2nd A length), velocity of Appl 2(Vout), deformation amplitude(DA), peak distance, and radius...
September 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27628587/corneal-thickening-and-central-flattening-induced-by-femtosecond-laser-hyperopic-shaped-intrastromal-lenticule-implantation
#8
Leonardo Mastropasqua, Mario Nubile
PURPOSE: To investigate the feasibility of the procedure and the modifications of the corneal curvature and profile obtained with a novel technique of stromal-lentoid implantation in ex vivo human corneas. DESIGN: Experimental ex vivo study in human corneas. MATERIALS AND METHODS: Twelve stromal lentoids were produced by means of hyperopic femtosecond lenticule extraction (FLEx) with the VisuMax femtosecond laser (Carl Zeiss Meditec, Jena, Germany) with a refractive power of +8...
September 15, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27621779/central-corneal-thickness-measurement-using-ultrasonic-pachymetry-rotating-scheimpflug-camera-and-scanning-slit-topography-exclusively-in-thin-non-keratoconic-corneas
#9
Mehrdad Mohammadpour, Kazem Mohammad, Nasser Karimi
PURPOSE: To evaluate the agreement among Pentacam, Orbscan and ultrasound (US) pachymetry for measurement of central corneal thickness (CCT) in thin corneas with normal topographic pattern. METHODS: We included 88 eyes of 44 refractive surgery candidates with thinnest pachymetric readings of 500 micrometers (μm) or less on Orbscan, a normal topographic pattern, no sign of keratoconus, and best corrected visual acuity (BCVA) of 20/20. Pentacam, Orbscan and US were performed in one session by the same examiner...
July 2016: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/27531114/-clinical-results-of-transepithelial-corneal-collagen-cross-linking-in-the-treatment-of-keratoconus
#10
S H Chen, J Zhang, Y N Li, P Ding, Q M Wang
OBJECTIVE: To evaluate the effect of transepithelial corneal collagen cross-linking (CXL) in the treatment of keratoconus. METHODS: Prospective study. Sixteen eyes of 16 patients with keratoconus underwent transepithelial CXL, and the fellow eyes were considered as the controls. The mean age was (22.4±6.5) years old. In the CXL group, topical anesthesia (0.1% tetracaine) was given for 15 minutes, and 0.5% riboflavin was applied until saturated in the anterior chamber...
July 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27472438/three-dimensional-mapping-of-the-orientation-of-collagen-corneal-lamellae-in-healthy-and-keratoconic-human-corneas-using-shg-microscopy
#11
Raffaella Mercatelli, Fulvio Ratto, Francesca Rossi, Francesca Tatini, Luca Menabuoni, Alex Malandrini, Riccardo Nicoletti, Roberto Pini, Francesco Saverio Pavone, Riccardo Cicchi
Keratoconus is an eye disorder that causes the cornea to take an abnormal conical shape, thus impairing its refractive functions and causing blindness. The late diagnosis of keratoconus is among the principal reasons for corneal surgical transplantation. This pathology is characterized by a reduced corneal stiffness in the region immediately below Bowman's membrane, probably due to a different lamellar organization, as suggested by previous studies. Here, the lamellar organization in this corneal region is characterized in three dimensions by means of second-harmonic generation (SHG) microscopy...
July 29, 2016: Journal of Biophotonics
https://www.readbyqxmd.com/read/27455826/keratoconus-in-patients-with-macular-stromal-dystrophy
#12
Panida Kosrirukvongs, Panotsom Ngowyutagon, Wipawee Booranapong
OBJECTIVE: To show the association between keratoconus and macular dystrophy. MATERIAL AND METHOD: All patients with macular dystrophy and associated clinical findings leading to a diagnosis of keratoconus by corneal topography were retrospectively reviewed during a 10-year period. Uncorrected and best-corrected visual acuity, automated refraction, manifest refraction, corneal thickness, and corneal curvature by corneal topography were evaluated RESULTS: Three patients with macular dystrophy exhibiting decreased vision, multifocal white dense deposits, and haze surrounding the deposits in the corneal stroma were evaluated...
January 2016: Journal of the Medical Association of Thailand, Chotmaihet Thangphaet
https://www.readbyqxmd.com/read/27429082/effects-of-atopic-syndrome-on-keratoconus
#13
Mehdi Shajari, Emanuel Eberhardt, Michael Müller, Ghada Al Khateeb, Stefan Friderich, Matthias Remy, Thomas Kohnen
PURPOSE: To evaluate the effects of atopic syndrome on manifestations of keratoconus. METHODS: In this retrospective study, we reviewed patient files and data generated by Scheimpflug imaging of 670 eyes of 434 keratoconus patients. Patients were divided into a study group consisting of patients suffering from atopic syndrome (110 eyes of 75 patients), namely allergic asthma, atopic dermatitis, and/or allergic rhinitis, and a control group of patients without known atopic syndrome (560 eyes of 359 patients)...
July 13, 2016: Cornea
https://www.readbyqxmd.com/read/27400080/enhanced-combined-tomography-and-biomechanics-data-for-distinguishing-forme-fruste-keratoconus
#14
Allan Luz, Bernardo Lopes, Katie M Hallahan, Bruno Valbon, Isaac Ramos, Fernando Faria-Correia, Paulo Schor, William J Dupps, Renato Ambrósio
PURPOSE: To evaluate the performance of the Ocular Response Analyzer (ORA) (Reichert Ophthalmic Instruments, Depew, NY) variables and Pentacam HR (Oculus Optikgeräte GmbH, Wetzlar, Germany) tomographic parameters in differentiating forme fruste keratoconus (FFKC) from normal corneas, and to assess a combined biomechanical and tomographic parameter to improve outcomes. METHODS: Seventy-six eyes of 76 normal patients and 21 eyes of 21 patients with FFKC were included in the study...
July 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27249007/transepithelial-high-intensity-cross-linking-for-the-treatment-of-progressive-keratoconus-2-year-outcomes
#15
Muhammet Bahattin Kır, Kemal Türkyılmaz, Veysi Öner
PURPOSE: To report 2-year outcomes of transepithelial high-intensity cross-linking (CXL) procedure in the treatment of patients with progressive keratoconus. METHODS: Forty-eight eyes of 48 consecutive progressive keratoconus patients who underwent transepithelial accelerated CXL procedure were enrolled in the study. Each patient underwent pre- and postoperative comprehensive ophthalmologic examinations including determination of refractive error as spherical equivalent (SE) and corrected distant visual acuity (CDVA), slit lamp biomicroscopic examination, fundoscopy, and a detailed analysis on a Scheimplug+Placido device (Sirius, CSO, Florence, Italy)...
June 1, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27191671/wave-front-guided-photorefractive-keratectomy-using-a-high-resolution-aberrometer-after-corneal-collagen-cross-linking-in-keratoconus
#16
Mohamed Shafik Shaheen, Ahmed Shalaby Bardan, David P Piñero, Hani Ezzeldin, Mohamed El-Kateb, Hany Helaly, Mounir A Khalifa
PURPOSE: To evaluate the clinical outcomes of wave front-guided (WFG) photorefractive keratectomy (PRK) using a high-definition aberrometer in corneas with keratoconus at least 1 year after corneal collagen cross-linking (CXL). METHODS: Prospective uncontrolled interventional case series study including a total of 34 consecutive eyes of 25 patients with keratoconus previously treated with CXL. All cases underwent WFG PRK using the VISX STAR S4 IR excimer laser and the iDesign system...
July 2016: Cornea
https://www.readbyqxmd.com/read/27163620/repeatability-of-wavefront-aberration-measurements-with-a-placido-based-topographer-in-normal-and-keratoconic-eyes
#17
Sara Ortiz-Toquero, Guadalupe Rodriguez, Victoria de Juan, Raul Martin
PURPOSE: To determine and compare the repeatability of anterior corneal higher order aberrations (HOAs) using a Placido-based topographer (Allegro Topolyzer; WaveLight Technologie AG, Alcon Laboratories, Erlangen, Germany) in a sample of normal and keratoconic eyes. METHODS: Three repeated measurements of each cornea of normal and keratoconic eyes were taken with the Allegro Topolyzer. Repeatability of the HOAs (3rd- and 4th-order individual values and normalized polar Zernike coefficients, coma-like, root mean square (RMS) up to 8th-order values, HOA RMS, and total RMS for 6-mm pupil diameter) and central corneal power (3-mm pupil) were analyzed...
May 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27163618/in-vivo-confocal-microscopy-after-contact-lens-assisted-corneal-collagen-cross-linking-for-thin-keratoconic-corneas
#18
Cosimo Mazzotta, Soosan Jacob, Amar Agarwal, Dhivya Ashok Kumar
PURPOSE: To study in vivo confocal microscopy (IVCM) after contact lens-assisted corneal collagen cross-linking (CACXL) in keratoconic eyes with thin corneas. METHODS: This prospective interventional case series included patients with progressive keratoconus with minimum corneal thickness less than 400 µm after removing epithelium. CACXL was done once functional corneal thickness was confirmed to be 400 µm or greater after applying a riboflavin-soaked, ultraviolet barrier-free contact lens...
May 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27143849/ectasia-risk-factors-in-refractive-surgery
#19
REVIEW
Marcony R Santhiago, Natalia T Giacomin, David Smadja, Samir J Bechara
This review outlines risk factors of post-laser in situ keratomileusis (LASIK) ectasia that can be detected preoperatively and presents a new metric to be considered in the detection of ectasia risk. Relevant factors in refractive surgery screening include the analysis of intrinsic biomechanical properties (information obtained from corneal topography/tomography and patient's age), as well as the analysis of alterable biomechanical properties (information obtained from the amount of tissue altered by surgery and the remaining load-bearing tissue)...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27134906/evaluation-of-ocular-side-effects-in-the-patients-on-topiramate-therapy-for-control-of-migrainous-headache
#20
Omid Hesami, Seyedeh Simindokht Hosseini, Nasim Kazemi, Seyed-Mostafa Hosseini-Zijoud, Nahid Beladi Moghaddam, Farhad Assarzadegan, Sara Mokhtari, Shahrzad Fakhraee
INTRODUCTION: Topiramate, a sulfa-derivative monosaccharide, is an antiepileptic drug which is administered in the control of migraine. It is reported to cause various ocular side effects such as visual field defect and myopic shift. To investigate the alterations in refractive error, properties of the cornea and changes in the anterior chamber in patients that receive Topiramate for migraine control. MATERIALS AND METHODS: This is a hospital-based, non-interventional, observational study that is conducted at Imam Hossein Hospital, affiliated to Shahid Beheshti University of Medical Sciences, Department of Neurology, in collaboration with the department of Ophthalmology...
March 2016: Journal of Clinical and Diagnostic Research: JCDR
keyword
keyword
109398
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"