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https://www.readbyqxmd.com/read/27846894/corneal-power-evaluation-after-myopic-corneal-refractive-surgery-using-artificial-neural-networks
#1
Robert Koprowski, Michele Lanza, Carlo Irregolare
BACKGROUND: Efficacy and high availability of surgery techniques for refractive defect correction increase the number of patients who undergo to this type of surgery. Regardless of that, with increasing age, more and more patients must undergo cataract surgery. Accurate evaluation of corneal power is an extremely important element affecting the precision of intraocular lens (IOL) power calculation and errors in this procedure could affect quality of life of patients and satisfaction with the service provided...
November 15, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27843285/clinical-outcomes-with-toric-intraocular-lenses-planned-using-an-optical-low-coherence-reflectometry-ocular-biometer-with-a-new-toric-calculator
#2
Kjell G Gundersen, Richard Potvin
PURPOSE: To prospectively evaluate postoperative clinical outcomes with implantation of toric intraocular lenses (IOLs) using preoperative keratometry from an optical low coherence reflectometry (OLCR) ocular biometer (Lenstar(®) LS900) and the built-in Barrett toric calculator. PATIENTS AND METHODS: A prospective observational study recruited one or both eyes of subjects who underwent uncomplicated cataract surgery with toric IOL implantation using OLCR biometery data and the Barrett toric IOL calculator for toric IOL planning...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27834962/agreement-and-clinical-comparison-between-a-new-swept-source-optical-coherence-tomography-based-optical-biometer-and-an-optical-low-coherence-reflectometry-biometer
#3
P Arriola-Villalobos, J Almendral-Gómez, N Garzón, J Ruiz-Medrano, C Fernández-Pérez, J M Martínez-de-la-Casa, D Díaz-Valle
PurposeTo compare measurements taken using a swept-source optical coherence tomography-based optical biometer (IOLmaster 700) and an optical low-coherence reflectometry biometer (Lenstar 900), and to determine the clinical impacts of differences in their measurements on intraocular lens (IOL) power predictions.MethodsEighty eyes of 80 patients scheduled to undergo cataract surgery were examined with both biometers. The measurements made using each device were axial length (AL), central corneal thickness (CCT), aqueous depth (AQD), lens thickness (LT), mean keratometry (MK), white-to-white distance (WTW), and pupil diameter (PD)...
November 11, 2016: Eye
https://www.readbyqxmd.com/read/27833928/comparison-of-a-new-optical-biometer-and-a-standard-biometer-in-cataract-patients
#4
Pipat Kongsap
BACKGROUND: Cataract surgery is the most common surgical procedure in ophthalmology. Biometry data and accurate intraocular lens (IOL) calculations are very important in achieving the desired refractive outcomes. The aim of this study was to compare measurements using a new optical low coherence reflectometry (OLCR) biometer (OA-2000) and the gold standard partial coherence interferometry (PCI) optical biometer (IOLMaster 500). METHODS: Ocular biometry of cataract patients were measured by the OA-2000 and IOLMaster 500 to compare keratometry (K), axial length (AL), anterior chamber depth (ACD), white-to-white (WTW) diameter, and IOL power using the SRK/T formula...
2016: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/27824378/nd-yag-capsulotomy-rates-with-two-trifocal-intraocular-lenses
#5
Rafael Bilbao-Calabuig, Fernando Llovet-Osuna, Felix González-López, Jaime Beltrán
PURPOSE: To compare Nd:YAG capsulotomy rates following implantation of two diffractive trifocal intraocular lenses (IOLs). METHODS: This multi-center retrospective analysis included patients who underwent uncomplicated lens phacoemulsification and were implanted with a diffractive trifocal IOL: FineVision MicroF (PhysIOL, Liège, Belgium) or AT Lisa tri 839MP (Carl Zeiss Meditec, Jena, Germany). All surgeries were performed during the same period. The postoperative follow-up period was at least 1 year...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27818207/validation-of-guidelines-for-undercorrection-of-intra-ocular-lens-iol-power-in-children
#6
Virender Sachdeva, Sushma Katukuri, Ramesh Kekunnaya, Merle Fernandes, Mohammed Hasnat Ali
INTRODUCTION: Initial undercorrection of intra-ocular lens (IOL power) is a common practice in children undergoing pediatric cataract surgery. However, long term refractive status of these children is largely unknown. The purpose of this study is to analyze the long-term refractive status of these children. DESIGN: Retrospective observational study METHODS: We analyzed records of children (< 7 yrs) who underwent cataract surgery where a primary IOL implantation was performed and had completed follow-up upto atleast 7 years of age...
November 3, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27795795/cataract-surgery-with-intraocular-lens-implantation-in-children-aged-5-15-in-local-anaesthesia-visual-outcomes-and-complications
#7
Kagmeni Giles, Domngang Christelle, Bilong Yannick, Otto Herrmann Fricke, Peter Wiedemann
The aim of this study was to report feasibility, the visual outcomes and complications of pediatric cataract surgery with primary intraocular lens implantation in children aged 5 to15 years in local anesthesia. This retrospective interventional case series included 62 eyes from 50 children who underwent pediatrc cataract surgery with primary intraocular lens implantation at the Mana eye Clinic Nkongsamba between 2006 and 2015 Main outcome measures were: best-corrected post operative visual acuity, and intraoperative and postoperative complications...
2016: Pan African Medical Journal
https://www.readbyqxmd.com/read/27793471/effect-of-pharmacological-pupil-dilation-on-measurements-and-iol-power-calculation-made-using-the-new-swept-source-optical-coherence-tomography-based-optical-biometer
#8
P Arriola-Villalobos, J Almendral-Gómez, N Garzón, J Ruiz-Medrano, C Fernández-Pérez, J M Martínez-de-la-Casa, D Díaz-Valle
PURPOSE: To determine whether pupil dilation affects biometric measurements and intraocular lens (IOL) power calculation made using the new swept-source optical coherence tomography-based optical biometer (IOLMaster 700(©); Carl Zeiss Meditec, Jena, Germany). PROCEDURES: Eighty-one eyes of 81 patients evaluated for cataract surgery were prospectively examined using the IOLMaster 700(©) before and after pupil dilation with tropicamide 1%. The measurements made were: axial length (AL), central corneal thickness (CCT), aqueous chamber depth (ACD), lens thickness (LT), mean keratometry (MK), white-to-white distance (WTW) and pupil diameter (PD)...
October 25, 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/27785598/pseudo-accommodation-in-non-amblyopic-children-after-bilateral-cataract-surgery-and-implantation-with-a-monofocal-intraocular-lens-prevalence-and-possible-mechanisms
#9
Charlotte Dénier, Pascal Dureau, Catherine Edelson, Amandine Barjol, Georges Caputo
BACKGROUND: Some pseudophakic patients implanted with a monofocal intraocular lens (IOL) have good near visual acuity (VA) with their distance correction. The objective was to evaluate the prevalence of pseudo-accommodation in children after bilateral cataract surgery, without amblyopia, and to define its mechanisms. METHODS: Observational study that took place in a pediatric ophthalmology department, Paris, France. A total of 68 eyes were included, 40 from 23 children and 28 from 14 adults, with a corrected distance VA above 20/25 and a normal near VA (20/25) with +3 addition...
October 26, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27776082/effect-of-decentration-on-the-optical-quality-of-two-intraocular-lenses
#10
Carolina Ortiz, José J Esteve-Taboada, Lurdes Belda-Salmerón, Daniel Monsálvez-Romín, Alberto Domínguez-Vicent
PURPOSE: To analyze the effect of decentration on the optical quality of two diffractive-refractive intraocular lenses, a bifocal and a trifocal, when displaced laterally (horizontal direction) from the center. METHODS: The AT LISA 809M IOL (+3.75 D add) with two main foci and the AT LISA tri 839MP intraocular lens with three main foci (Carl Zeiss Meditec AG, Jena, Germany) were analyzed. The optical quality of the intraocular lenses was measured with the PMTF (power and modulation transfer function [MTF] measurement for refractive and diffractive intraocular lenses) optical bench (Lambda-X, Nivelles, Belgium)...
December 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27769585/prediction-of-postoperative-intraocular-lens-position-with-angle-to-angle-depth-using-anterior-segment-optical-coherence-tomography
#11
So Goto, Naoyuki Maeda, Shizuka Koh, Kazuhiko Ohnuma, Kenichi Hayashi, Ikko Iehisa, Toru Noda, Kohji Nishida
PURPOSE: To evaluate the accuracy of a new formula for predicting postoperative anterior chamber depth (ACD) with preoperative angle-to-angle (ATA) depth using anterior segment (AS) optical coherence tomography (OCT) and to compare it with established methods. DESIGN: Retrospective consecutive case series. PARTICIPANTS: Three hundred four eyes (276 patients) implanted with acrylic intraocular lenses (IOLs) were divided randomly into a training set (152 eyes) and a validation set (152 eyes)...
October 18, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27703323/toric-intraocular-lens-orientation-and-residual-refractive-astigmatism-an-analysis
#12
Rick Potvin, Brent A Kramer, David R Hardten, John P Berdahl
PURPOSE: To analyze intraocular lens (IOL) orientation data from an online toric back-calculator (astigmatismfix.com) for determining if differences were apparent by lens type. METHODS: A retrospective review of astigmatismfix.com toric back-calculations that included IOL identification and intended orientation axis. RESULTS: Of 12,812 total validated calculation records, 8,229 included intended orientation and lens identification data. Of the latter, 5,674 calculations (69%) involved lenses oriented 5° or more from their intended position...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27702623/changes-in-ocular-parameters-and-intraocular-lens-powers-in-aging-cycloplegic-eyes
#13
Pelin Özyol, Erhan Özyol, Ercan Baldemir
PURPOSE: Age-related changes in lens elasticity and ciliary muscle contractility can affect how ocular parameters respond to cycloplegia, and therefore intraocular lens (IOL) power measurements calculated by formulas using anterior chamber depth (ACD), lens thickness (LT), or white-to-white (WtW) for effective lens position prediction can vary. In response, using swept-source optical biometry in prepresbyopic and presbyopic eyes, we investigated changes in ocular parameters and IOL power calculations attributable to cycloplegia...
January 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27672591/effects-of-posterior-corneal-astigmatism-on-the-accuracy-of-acrysof-toric-intraocular-lens-astigmatism-correction
#14
Bin Zhang, Jing-Xue Ma, Dan-Yan Liu, Cong-Rong Guo, Ying-Hua Du, Xiu-Jin Guo, Yue-Xian Cui
AIM: To evaluate the effects of posterior corneal surface measurements on the accuracy of total estimated corneal astigmatism. METHODS: Fifty-seven patients with toric intraocular lens (IOL) implantation and posterior corneal astigmatism exceeding 0.5 diopter were enrolled in this retrospective study. The keratometric astigmatism (KA) and total corneal astigmatism (TA) were measured using a Pentacam rotating Scheimpflug camera to assess the outcomes of AcrySof IOL implantation...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/27661991/refractive-outcome-of-cataract-surgery-in-eyes-with-prior-trabeculectomy-risk-factors-for-postoperative-myopia
#15
Oliver L Yeh, Karine D Bojikian, Mark A Slabaugh, Philip P Chen
PURPOSE: To examine refractive outcomes after phacoemulsification in eyes with prior trabeculectomy. DESIGN: Retrospective observational case-control study METHODS:: Comparison of eyes of glaucoma patients undergoing cataract surgery after trabeculectomy (study group) with a matched group with medically controlled glaucoma (control group). Laser interferometry was used to obtain ocular biometry. We measured the difference between the expected and actual postoperative refraction using third-generation and fourth-generation intraocular lens (IOL) prediction formulae (Haigis, Holladay 2, Hoffer Q, and SRK-T)...
September 21, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27646332/comparison-of-visual-function-after-implantation-of-inferior-sector-shaped-intraocular-lenses-low-add-1-5-d-vs-3-0-d
#16
Aeri Yoo, Joo Young Kwag, In Seok Song, Myoung Joon Kim, Hyerin Jeong, Jae Yong Kim, Hungwon Tchah
PURPOSE: To compare visual function after implantation of multifocal Lentis comfort LS-313 MF 15 (group 1) or Lentis M plus LS-313 MF 30 (group 2) intraocular lenses (IOLs). METHODS: Patients between 49 and 76 years of age who received monocular cataract surgery with multifocal IOL implantation were analyzed. Patients were evaluated preoperatively and for 5 months postoperatively for distance, intermediate, and near visual acuities, and static photopic and mesopic contrast sensitivity...
September 7, 2016: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/27642519/outcomes-of-sutureless-iris-claw-lens-implantation
#17
Tomasz Choragiewicz, Robert Rejdak, Andrzej Grzybowski, Katarzyna Nowomiejska, Joanna Moneta-Wielgoś, Małgorzata Ozimek, Anselm G M Jünemann
Purpose. To evaluate the indications, refraction, and visual and safety outcomes of iris-claw intraocular lens implanted retropupillary with sutureless technique during primary or secondary operation. Methods. Retrospective study of case series. The Haigis formula was used to calculate intraocular lens power. In all cases the wound was closed without suturing. Results. The study comprised 47 eyes. The mean follow-up time was 15.9 months (SD 12.2). The mean preoperative CDVA was 0.25 (SD 0.21). The final mean CDVA was 0...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27586670/scheimpflug-camera-combined-with-placido-disk-corneal-topography-and-optical-biometry-for-intraocular-lens-power-calculation
#18
Ahmet Kirgiz, Kurşat Atalay, Havva Kaldirim, Kubra Serefoglu Cabuk, Mehmet Orcun Akdemir, Muhittin Taskapili
The purpose of this study was to compare the keratometry (K) values obtained by the Scheimpflug camera combined with placido-disk corneal topography (Sirius) and optical biometry (Lenstar) for intraocular lens (IOL) power calculation before the cataract surgery, and to evaluate the accuracy of postoperative refraction. 50 eyes of 40 patients were scheduled to have phacoemulsification with the implantation of a posterior chamber intraocular lens. The IOL power was calculated using the SRK/T formula with Lenstar K and K readings from Sirius...
September 1, 2016: International Ophthalmology
https://www.readbyqxmd.com/read/27573881/toric-intraocular-lens-implantation-in-children-with-developmental-cataract-and-preexisting-corneal-astigmatism
#19
Jagat Ram, Rishiraj Singh, Rohit Gupta, Garvit Bhutani, Parul Chawla Gupta, Jaspreet Sukhija
PURPOSE: To evaluate the effect of toric intraocular lens (IOL) implantation on the refractive outcomes in children with cataract and preexisting corneal astigmatism. METHODS: We included children between the age group of 8-14 years who were randomized into group I (toric) and group II (non-toric), in which toric and spherical IOLs were implanted, respectively, after phacoaspiration. Primary outcome measure was comparison of preoperative keratometric and postoperative refractive cylinder...
August 30, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27562431/influence-of-patient-age-on-intraocular-lens-power-prediction-error
#20
Ken Hayashi, Soichiro Ogawa, Motoaki Yoshida, Koichi Yoshimura
PURPOSE: To examine whether intraocular lens (IOL) power prediction error (PE) after cataract surgery differs according to patient age. DESIGN: Prospective cohort study. METHODS: We consecutively enrolled 75 eyes of 75 patients 59 years of age or younger, and 150 eyes of 150 patients in each of 3 age groups (60-69, 70-79, and 80-89 years), for whom phacoemulsification and implantation of a single-piece acrylic IOL was planned. The IOL power was calculated using the optimized SRK/T formula...
October 2016: American Journal of Ophthalmology
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