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https://www.readbyqxmd.com/read/28060075/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#1
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
February 2017: Cornea
https://www.readbyqxmd.com/read/27984365/mid-term-results-of-a-single-intrastromal-corneal-ring-segment-for-mild-to-moderate-progressive-keratoconus
#2
Mohammad Miraftab, Hassan Hashemi, Farhad Hafezi, Soheila Asgari
PURPOSE: To study the mid-term effects of implanting a single intracorneal ring segment (ICRS) for treatment of mild to moderate progressive keratoconus. METHODS: This retrospective study was conducted on patients with progressive keratoconus treated with ICRS. The mean follow-up time was 15.2 ± 8.8 (range, 7-26) months before and 27.8 ± 7.5 (range, 18-35) months after surgery. Patients received no other treatment during this time. Of the cases studied, 59.1% had inferior keratoconus...
December 14, 2016: Cornea
https://www.readbyqxmd.com/read/27930793/intracorneal-ring-segments-implantation-for-corneal-ectasia
#3
Natalia T Giacomin, Glauco R Mello, Carla S Medeiros, Alyin Kiliç, Cristine C Serpe, Hirlana G Almeida, Newton Kara-Junior, Marcony R Santhiago
PURPOSE: To provide an overview of the predictability, safety, and efficacy of intrastromal corneal ring segment (ICRS) implantation as a tool to improve visual acuity and its association with other techniques such as corneal collagen cross-linking (CXL), addressing biomechanical outcomes, models, surgical planning and technique, indications, contraindications, and complications in ectatic corneas. METHODS: Literature review. RESULTS: ICRSs have been used to regularize the corneal shape and reduce corneal astigmatism and higher order aberrations, improve visual acuity to acceptable limits, and delay, or eventually prevent, a corneal keratoplasty in keratoconic eyes...
December 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27918353/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#4
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27804048/clinical-evaluation-of-two-types-of-intracorneal-ring-segments-icrs-for-keratoconus
#5
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/27505314/pediatric-keratoconus-in-a-tertiary-referral-center-incidence-presentation-risk-factors-and-treatment
#6
Sylvain El-Khoury, Youssef Abdelmassih, Adib Hamade, Elise Slim, Carole G Cherfan, Elias Chelala, Jamal Bleik, Elias F Jarade
PURPOSE: To report the incidence, clinical presentation, risk factors, and treatment outcome of pediatric keratoconus in a tertiary referral eye hospital in Beirut, Lebanon. METHODS: In this retrospective study, the authors evaluated all patients with keratoconus 14 years or younger newly diagnosed at the Beirut Eye Specialist Hospital, Beirut, Lebanon, between January 2010 and December 2014. The incidence of pediatric keratoconus among all pediatric patients and among patients with keratoconus of all ages was assessed...
August 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27315293/-intracorneal-ring-segments-to-treat-keratectasia-interim-results-and-potential-complications
#7
M El-Husseiny, L Daas, A Langenbucher, B Seitz
BACKGROUND AND PURPOSE: Implantation of intracorneal ring segments (ICRS) using a femtosecond laser is a minimally invasive procedure which represents a reliable option to widen the spectrum of the stage-related therapy of keratoconus in patients with contact lens intolerance, or with post-LASIK-keratectasia or pellucide marginale degeneration (PMD). METHODS: From August 2011 to September 2015, 84 eyes of 69 patients were implanted with ICRS. 74 eyes were implanted with INTACS-SK (Intacs, Addition Technology, Inc...
June 2016: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27315289/prevention-of-iatrogenic-keratectasia
#8
C J Rapuano
Iatrogenic corneal ectasia is a rare but devastating complication after refractive surgery. While its incidence appears to be declining, it has not been eliminated. Its cause is probably related to a combination of an intrinsic predisposition to ectasia and an additional anatomical destabilising effect from the refractive surgery. Determining which eyes are intrinsically "weak" and exactly how much additional "weakening" an eye can withstand before developing progressive thinning and protrusion are both difficult tasks...
June 2016: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27143847/advances-in-femtosecond-laser-technology
#9
REVIEW
Thais Pinheiro Callou, Renato Garcia, Adriana Mukai, Natalia T Giacomin, Rodrigo Guimarães de Souza, Samir J Bechara
Femtosecond laser technology has become widely adopted by ophthalmic surgeons. The purpose of this study is to discuss applications and advantages of femtosecond lasers over traditional manual techniques, and related unique complications in cataract surgery and corneal refractive surgical procedures, including: LASIK flap creation, intracorneal ring segment implantation, presbyopic treatments, keratoplasty, astigmatic keratotomy, and intrastromal lenticule procedures.
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27041991/combined-femtosecond-laser-assisted-intracorneal-ring-segment-implantation-and-corneal-collagen-cross-linking-for-correction-of-keratoconus
#10
Osama Ibrahim, Ahmed Elmassry, Amr Said, Moones Abdalla, Hazem El Hennawi, Ihab Osman
PURPOSE: To assess the safety, predictability, and effectiveness of Keraring intrastromal corneal ring segments (ICRS) insertion assisted by femtosecond laser and corneal collagen cross-linking (CXL) for keratoconus correction. PATIENTS AND METHODS: In this prospective, noncomparative, and interventional case series, 160 eyes of 100 adult keratoconus patients with poor best-corrected visual acuity (BCVA) (less than 0.7) and intolerance to contact lens wear were included...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/26981548/the-use-of-intracorneal-ring-segments-in-keratoconus
#11
REVIEW
Alfredo Vega-Estrada, Jorge L Alio
Keratoconus is a corneal degeneration that usually appears during puberty and may seriously deteriorate the quality of life of the patients. This corneal disease is today the first indication of corneal transplantation in young patients. Until the last decade of the XX century, keratoplasty procedures were the only alternative to treat this pathological condition. In the beginning of the XXI century, intracorneal ring segments implantation was proposed as a therapeutic choice for treating keratoconus patients...
2016: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/26899123/-severe-corneal-melting-long-after-introduction-of-an-intracorneal-ring-for-keratoconus
#12
P Loriaut, C Temstet, V Borderie, L Laroche
No abstract text is available yet for this article.
March 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/26889567/clinical-refractive-and-histological-reversibility-of-corneal-additive-surgery-in-deep-stroma-in-an-animal-model
#13
Lucía Ibares-Frías, Patricia Gallego, Roberto Cantalapiedra-Rodriguez, Jesús Merayo-Lloves, María Carmen Martínez-García
PURPOSE: The aim was to evaluate the reversibility of the clinical and histological changes induced in the corneas of an animal model after removing an intracorneal ring segment (ICRS). METHODS: Surgery for this study was performed in 38 eyes of an experimental animal model (Gallus domesticus) for ICRS surgery (Ferrara technique). The animals without complications were randomized to two groups; in all of them, 1 segment was implanted in each eye and later removed at different times (1 and 3 months after implantation)...
September 2016: Current Eye Research
https://www.readbyqxmd.com/read/26605365/the-evolution-of-corneal-and-refractive-surgery-with-the-femtosecond-laser
#14
REVIEW
Antonis Aristeidou, Elise V Taniguchi, Michael Tsatsos, Rodrigo Muller, Colm McAlinden, Roberto Pineda, Eleftherios I Paschalis
The use of femtosecond lasers has created an evolution in modern corneal and refractive surgery. With accuracy, safety, and repeatability, eye surgeons can utilize the femtosecond laser in almost all anterior refractive procedures; laser in situ keratomileusis (LASIK), small incision lenticule extraction (SMILE), penetrating keratoplasty (PKP), insertion of intracorneal ring segments, anterior and posterior lamellar keratoplasty (Deep anterior lamellar keratoplasty (DALK) and Descemet's stripping endothelial keratoplasty (DSEK)), insertion of corneal inlays and cataract surgery...
2015: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/26356750/sequential-intracorneal-ring-segment-implantation-and-corneal-transepithelial-collagen-cross-linking-in-keratoconus
#15
RANDOMIZED CONTROLLED TRIAL
Hany S Elsaftawy, Mansour Hassan Ahmed, Mohamed Yasser Sayed Saif, Rasha Mousa
PURPOSE: To assess the clinical outcomes after sequential surgical implantation of intracorneal ring segments and transepithelial corneal collagen cross-linking (TE-CXL) in keratoconic eyes. METHODS: In this consecutive randomized study, 40 eyes of 29 patients with progressive mild to moderate keratoconus were included and were randomly divided into two groups. Group 1 included 20 eyes that underwent Keraring implantation, and group 2 included 20 eyes that underwent Keraring insertion followed by TE-CXL 1 month later...
November 2015: Cornea
https://www.readbyqxmd.com/read/26312619/biomechanics-of-corneal-ring-implants
#16
Albert Daxer
PURPOSE: To evaluate the biomechanics of corneal ring implants by providing a related mathematical theory and biomechanical model for the treatment of myopia and keratoconus. METHODS: The spherical dome model considers the inhomogeneity of the tunica of the eye, dimensions of the cornea, lamellar structure of the corneal stroma, and asphericity of the cornea. It is used in this study for calculating a strengthening factor sf for the characterization of different ring-shaped corneal implant designs...
November 2015: Cornea
https://www.readbyqxmd.com/read/26177129/-results-and-effectiveness-of-keraring-implantation-with-the-help-of-femtosecond-laser-patients-with-keratoconus
#17
A Zilfyan
In our study 58 eyes with III stage keratoconus underwent surgery using femtosecond laser Ziemer Cristalline (Switzerland) intracorneal stromal ring segment implantation (Keraring). We examine eyes before and after the surgery with the help of special ophthalmic equipment (visometry, tonometry, biomicroscopy, ophthalmoscopy autorefkeratometry, pakhimetry, and corneal topography). The last measurement was done with Scheimpflug camera on Pentacam (Oculus). In the present study there were no intraoperative complications...
July 2015: Georgian Medical News
https://www.readbyqxmd.com/read/26077628/treatment-options-for-advanced-keratoconus-a-review
#18
REVIEW
Jack S Parker, Korine van Dijk, Gerrit R J Melles
Traditionally, the mainstay of treatment for advanced keratoconus (KC) has been either penetrating or deep anterior lamellar keratoplasty (PK or DALK, respectively). The success of both operations, however, has been somewhat tempered by potential difficulties and complications, both intraoperatively and postoperatively. These include suture and wound-healing problems, progression of disease in the recipient rim, allograft reaction, and persistent irregular astigmatism. Taken together, these have been the inspiration for an ongoing search for less troublesome therapeutic alternatives...
September 2015: Survey of Ophthalmology
https://www.readbyqxmd.com/read/26055226/feasibility-of-custom-made-hydrogel-contact-lenses-in-keratoconus-with-previous-implantation-of-intracorneal-ring-segments
#19
RANDOMIZED CONTROLLED TRIAL
Fernando José Fernández-Velázquez, Maria José Fernández-Fidalgo
PURPOSE: To analyze the feasibility of a custom-made hydrogel silicone contact lens (CL) in keratoconus with intracorneal ring segments (ICRS) and to compare outcomes taking in consideration the geometry of the fitted lens-full periphery (FP) vs. sector management control (SMC). METHOD: A retrospective review of cases with previous KeraRings ICRS implantation and subsequently fitted with Kerasoft-IC CL was performed. The main outcome measurements were corrected spectacle distance visual acuity (CDVA), differences between flat and steep simulated keratometries (K-diff) and between steep and flat P values (CPV-diff), CL visual acuity (CLVA), wearing time (WT) and complications associated with wear...
October 2015: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/25996423/cross-linking-and-intracorneal-ring-segments-review-of-the-literature
#20
LETTER
Noa Avni-Zauberman, David S Rootman
No abstract text is available yet for this article.
July 2015: Eye & Contact Lens
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