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https://www.readbyqxmd.com/read/28634928/comparison-of-formulas-and-methods-for-high-myopia-patients-requiring-intraocular-lens-powers-less-than-six-diopters
#1
Harry S Geggel
PURPOSE: To determine the best method to minimize postoperative hyperopia and achieve mild myopia in patients requiring low-powered (<6.00 D) MN60MA intraocular lenses (IOLs). METHODS: This retrospective non-comparative case series consists of 32 eyes (20 patients). Postoperative spherical equivalent (SE) refractions were compared using four methods: standard formulas with varying target refractions (Haigis -1.00 D, Hoffer Q -1.75 D, Holladay 1 -1.50 D and SRK/T -1...
June 20, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28612950/the-paediatric-cataract-register-pecare-an-overview-of-operated-childhood-cataract-in-sweden-and-denmark
#2
Gunilla Magnusson, Birgitte Haargaard, Saima Basit, Anna Lundvall, Alf Nyström, Annika Rosensvärd, Kristina Tornqvist
AIM: To report basic epidemiological data concerning surgically treated childhood cataract in Sweden and Denmark. METHODS: Data were derived from the Paediatric Cataract Register (PECARE), a binational, web-based surgical register representing Sweden and Denmark. All children operated before 8 years of age between 1 January 2007 and 31 December 2013 were included. Age-specific prevalence per 100 000 population was calculated. RESULTS: A total 574 operations in 213 boys (51...
June 14, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28586499/a-new-extended-depth-of-focus-intraocular-lens-based-on-spherical-aberration
#3
Roberto Bellucci, Maria C Curatolo
PURPOSE: To describe a new extended depth of focus intraocular lens (IOL) design offering multifocality by the variation of spherical aberration in the central optical zone. METHODS: The new IOL (Mini WELL; SIFI, Catania, Italy) is an aspheric IOL with positive spherical aberration in the central 2-mm zone and negative spherical aberration in the pericentral 1-mm annulus, the amount of which was determined by specific optic calculation. The new IOL design was tested at the optical bench to investigate depth of focus and sensitivity to tilt, decentration, and angle Kappa...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28553547/changes-in-anterior-posterior-and-total-corneal-astigmatism-after-descemet-membrane-endothelial-keratoplasty
#4
Maged Alnawaiseh, Lars Zumhagen, André Rosentreter, Nicole Eter
Purpose. To evaluate changes in anterior, posterior, and total corneal astigmatism in patients after Descemet membrane endothelial keratoplasty (DMEK). Methods. We retrospectively included 29 eyes of 23 patients (age 67.6 ± 9.8 years, 13 female, 10 male) after DMEK surgery. The magnitude and axis orientation of anterior, posterior, and total corneal astigmatism before and after DMEK were determined using a rotating Scheimpflug system (Pentacam HR, Oculus). Results. The magnitude of anterior, posterior, and total corneal astigmatism in the central cornea did not change significantly after surgery...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28553072/preoperative-measurement-vs-intraoperative-aberrometry-for-the-selection-of-intraocular-lens-sphere-power-in-normal-eyes
#5
James A Davison, Richard Potvin
PURPOSE: This study aimed to assess the value of intraoperative aberrometry (IA) in determining the intraocular lens (IOL) sphere power in eyes with no previous ocular surgery. PATIENTS AND METHODS: We conducted a retrospective review of patients who underwent uncomplicated cataract surgery where standard preoperative (Preop) measurements and IA were performed. Calculated IOL sphere powers and postoperative refractions, both actual and theoretical, were compared based on the measurement method and lens type; lens types included multifocal, toric and aspheric single-vision non-toric IOLs...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28540007/anterior-chamber-depth-change-following-cataract-surgery-in-pseudoexfoliation-syndrome-a-preliminary-study
#6
Mohammad Reza Fallah Tafti, Hossein Abdollah Beiki, S Farzad Mohammadi, Golshan Latifi, Elham Ashrafi, Zahra Fallah Tafti
PURPOSE: To assess the pseudophakic anterior chamber depth (PP-ACD) or effective lens position (ELP) change after cataract surgery in patients with pseudoexfoliation syndrome (PEX). METHODS: Consecutive eyes with PEX and cataract underwent standard phacoemulsification and were implanted with single-piece acrylic posterior chamber intraocular lenses (IOLs). Eyes with severe PEX and with axial length (AL) greater than 24 mm or less than 22 mm were not included. Eyes with capsular complication or unstable bags that needed capsular tension ring insertion were excluded...
April 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28532935/toric-outcomes-computer-assisted-registration-versus-intraoperative-aberrometry
#7
Jonathan D Solomon, John Ladas
PURPOSE: To compare refractive outcomes of intraoperative computer-assisted registration and intraoperative aberrometry for the reduction of cylinder during toric intraocular lens (IOL) placement. SETTING: Bowie Vision Institute, Bowie, Maryland, USA. DESIGN: Prospective randomized case series. METHOD: The patients were divided into 2 groups that had toric IOL implantation after phacoemulsification. The intraoperative computer-assisted registration group (Group 1) had preoperative toric calculations...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28526552/anisometropia-at-age-5-years-after-unilateral-intraocular-lens-implantation-during-infancy-in-the-infant-aphakia-treatment-study-iats
#8
David Weakley, George Cotsonis, M Edward Wilson, David A Plager, Edward G Buckley, Scott R Lambert
PURPOSE: To report the prevalence of anisometropia at age 5 years after unilateral intraocular lens (IOL) implantation in infants. DESIGN: Prospective randomized clinical trial METHODS: Fifty-seven infants in the Infant Aphakia Treatment Study (IATS) with a unilateral cataract were randomized to IOL implantation with an initial targeted postoperative refractive error of either +8D (infants 28 to <48 days of age) or +6D (infants 48-210 days of age). Anisometropia was calculated at age 5 years...
May 16, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28494996/prediction-of-labor-onset-type-spontaneous-vs-induced-role-of-electrohysterography
#9
Jose Alberola-Rubio, Javier Garcia-Casado, Gema Prats-Boluda, Yiyao Ye-Lin, Domingo Desantes, Javier Valero, Alfredo Perales
BACKGROUND AND OBJECTIVE: Induction of labor (IOL) is a medical procedure used to initiate uterine contractions to achieve delivery. IOL entails medical risks and has a significant impact on both the mother's and newborn's well-being. The assistance provided by an automatic system to help distinguish patients that will achieve labor spontaneously from those that will need late-term IOL would help clinicians and mothers to take an informed decision about prolonging pregnancy. With this aim, we developed and evaluated predictive models using not only traditional obstetrical data but also electrophysiological parameters derived from the electrohysterogram (EHG)...
June 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28476316/aberration-free-intraocular-lenses-what-does-this-really-mean
#10
Achim Langenbucher, Simon Schröder, Alan Cayless, Timo Eppig
BACKGROUND: So-called aberration-free intraocular lenses (IOLs) are well established in modern cataract surgery. Usually, they are designed to perfectly refract a collimated light beam onto the focal point. METHODS: We show how much aberration can be expected with such an IOL in a convergent light beam such as that found anterior to the human cornea. Additionally, the aberration in a collimated beam is estimated for an IOL that has no aberrations in the convergent beam...
May 3, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/28464806/the-effect-of-ocular-biometric-factors-on-the-accuracy-of-various-iol-power-calculation-formulas
#11
Jinho Jeong, Han Song, Jimmy K Lee, Roy S Chuck, Ji-Won Kwon
BACKGROUND: To evaluate how differences in ocular biometry affects the Hoffer Q, Holladay 1, SRK/T, and Haigis intraocular lens power calculation formulae predictions. METHODS: This study was performed on 91 eyes of 91 patients who underwent uneventful cataract surgery. Ocular biometry values were measured using the IOL Master 500, and intraocular lens (IOL) power was calculated using the Haigis, Hoffer Q, Holladay 1, and SRK/T formulas. We calculated the expected difference (ED) of each 3rd generation formula from the Haigis formula by subtracting the predicted refraction of the Haigis formula from the predicted refraction of each 3rd generation formula...
May 2, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28461737/comparison-of-the-biometric-measurements-calculated-with-zeiss-iol-master-and-wavelight-ob-820
#12
Georgios Labiris, Panagiota Ntonti, Konstantinos Ntitsos, Andreas Katsanos, Haris Sideroudi, Vasilios Kozobolis
BACKGROUND: The primary objective of this study was to investigate the level of agreement between IOL-Master and OB-820 ocular biometers. MATERIALS AND METHODS: In this prospective randomized case series, we measured the anterior chamber depth (ACD), the axial length (AL), the corneal radii (R1, R2), the ratio of mean corneal radius and spherical equivalent and the corneal astigmatism (cylinder [Cyl]) before and after cataract extraction surgery. RESULTS: Significant differences between pre- and postoperative data were observed for ACD for both biometric devices (P<0...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28444515/cataract-surgery-in-patients-with-a-previous-history-of-kamra-inlay-implantation-a-case-series
#13
Majid Moshirfar, Tyler S Quist, David F Skanchy, Steven H Linn, Jordan Desautels, Phillip C Hoopes
INTRODUCTION: The visual outcome of cataract surgery in patients with a previous history of KAMRA inlay implantation is an emerging issue for which limited research exists. The purpose of this study is to describe postoperative visual outcomes in this patient population. METHODS: This is a case series with retrospective chart review. Seven patients underwent cataract surgery following KAMRA corneal inlay implantation. Visual acuity was assessed before and after cataract surgery...
June 2017: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/28440249/innovations-in-pediatric-cataract-surgery
#14
Sudarshan Kumar Khokhar, Ganesh Pillay, Esha Agarwal, Manish Mahabir
Advances in technology have made surgery in children safer and faster. The management of pediatric cataract has made rapid progress in the past decade with the availability of safer anesthesia, newer technique's, more predictable intraocular lens (IOL) power calculation, a better understanding of neurobiology, genetics, amblyopia management, improved IOL designs for preventing visual axis opacification, and adjuvant postoperative care. Modern vitrectomy machines with minimally invasive instruments, radiofrequency, diathermy, and plasma blades help immensely in complicated cases...
March 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28412798/-intraocular-lens-power-calculation-for-high-myopic-eyes-with-cataract-comparison-of-three-formulas
#15
X J Zhu, W W He, Y Du, D J Qian, J H Dai, Y Lu
Objective: To compare the accuracy of three different formulas for intraocular lens power calculation in high myopic eyes with cataract and analyze their influencial factors. Methods: One hundred and three high myopic patients of cataract (103 eyes), with average age of 60.2±8.8 years old (39.0-77.0), including 45 male and 54 female and with axial length ≥ 26 mm were enrolled in this retrospective case-series study. All of them underwent routine ocular examination and IOLMastermeasurement preoperatively and then underwent phacoemulsification through temporal clear-corneal incision with implantation of HumanOptic posterior chamber Intraocular lens (IOL)...
April 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28410715/comparison-of-astigmatic-prediction-errors-associated-with-new-calculation-methods-for-toric-intraocular-lenses
#16
Tiago B Ferreira, Paulo Ribeiro, Filomena J Ribeiro, João G O'Neill
PURPOSE: To compare the prediction errors in residual astigmatism associated with new calculation methods for toric intraocular lenses (IOLs). SETTING: Hospital da Luz, Lisbon, Portugal. DESIGN: Retrospective case series. METHODS: In eyes having cataract surgery with toric IOL implantation (Acrysof IQ), the predicted residual astigmatism by each calculation method was compared with the manifest refractive astigmatism...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28410714/accuracy-of-3-new-methods-for-intraocular-lens-power-selection
#17
Jack X Kane, Anton Van Heerden, Alp Atik, Constantinos Petsoglou
PURPOSE: To evaluate the accuracy of 3 new methods for intraocular lens (IOL) power selection (Hill-Radial Basis Function [Hill-RBF] method, FullMonte method, and the Ladas Super Formula) compared with that of the Holladay 1 and Barrett Universal II formulas. SETTING: Ophthalmology Department, Alfred Hospital, Melbourne, Australia. DESIGN: Retrospective case series. METHODS: Patients who had uneventful cataract surgery with insertion of the Acrysof IQ SN60WF IOL over 5 years were included in the study...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28390411/prediction-accuracy-of-intraocular-lens-power-calculation-methods-after-laser-refractive-surgery
#18
Yubo Wu, Songyu Liu, Rongfeng Liao
BACKGROUND: This study aimed to evaluate the prediction accuracy of postoperative refractions using partial coherence interferometry (IOL-Master) and applanation ultrasound (AL-3000) assisted with corneal topography (TMS-4) in eyes that had undergone myopic laser-assisted in situ keratomileusis (LASIK). METHODS: Haigis-L formula, Koch-Maloney method using Haigis formula, Shammas clinically derived K-value (simulated keratometric value) correction (Shammas c.d.) using Haigis formula, and Shammas post-LASIK (Shammas-PL) formula were used in eyes with myopic LASIK...
April 8, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28371281/the-effect-of-cataract-surgery-and-iol-implantation-on-the-magnification-of-a-fundus-photograph-a-pilot-study
#19
Laura Knaapi, Tuomo Lehtonen, Eija Vesti
PURPOSE: The goal was to determine the effect of cataract surgery-induced change in ametropia and anterior chamber depth on the magnification of a fundus photograph. METHODS: Fundus photographs were taken from 11 subjects undergoing cataract surgery and intraocular lens (IOL) implantation before and after surgery with a telecentric Zeiss and Topcon fundus cameras. The distance between two distinct fundus landmarks, i.e. two crossings of retinal vessels, was measured before and after surgery, and the results were compared to axial length and surgery-induced change in ametropia and anterior chamber depth...
March 31, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28366365/intraocular-lens-power-calculations-in-eyes-with-previous-hyperopic-laser-in-situ-keratomileusis-or-photorefractive-keratectomy
#20
Eric B Hamill, Li Wang, Hayley K Chopra, Warren Hill, Douglas D Koch
PURPOSE: To evaluate the accuracy of 7 intraocular lens (IOL) calculation formulas in patients with previous hyperopic laser in situ keratomileusis (LASIK) or excimer laser photorefractive keratectomy (PRK). DESIGN: Retrospective case series. SETTING: Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, and private practice, Mesa, Arizona, USA. METHODS: The 7 formulas evaluated were the adjusted Atlas 0-3, Masket, Modified Masket, Haigis-L, Shammas-PL, Barrett True-K, and Barrett True-K No-History...
February 2017: Journal of Cataract and Refractive Surgery
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