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https://www.readbyqxmd.com/read/29036175/the-efficiency-of-aspheric-intraocular-lens-according-to-biometric-measurements
#1
Woong-Joo Whang, Junjie Piao, Young-Sik Yoo, Choun-Ki Joo, Geunyoung Yoon
PURPOSE: To analyze internal spherical aberration in pseudophakic eyes that underwent aspheric intraocular lens (IOL) implantation, and to investigate the relationships between biometric data and the effectiveness of aspheric IOL implantation. METHODS: This retrospective study included 40 eyes of 40 patients who underwent implantation of an IOL having a negative spherical aberration of -0.20 μm (CT ASPHINA 509M; Carl Zeiss Meditec Inc., Germany). The IOLMaster (version 5...
2017: PloS One
https://www.readbyqxmd.com/read/29025173/-impact-of-near-addition-on-the-optical-quality-of-diffractive-multifocal-intraocular-lenses-a-laboratory-study-using-an-optical-bench
#2
Tamer Tandogan, Gerd Uwe Auffarth, Stephanie Liebing, Chul Young Choi, Ramin Khoramnia
Purpose To analyse the optical quality of diffractive multifocal intraocular lenses (IOLs) with different near additions in a laboratory study. Methods We analysed the AcrySof(®) IQ ReSTOR(®) + 2.5 D SV25T0 (Alcon Laboratories inc., Fort Worth, USA), the AcrySof(®) IQ ReSTOR(®) + 3.0 D SN6AD1 (Alcon, USA) and the TECNIS(®) ZMA00 and ZMB00 (Abbott Medical Optics, USA) with a power of 21D for the distance, using the OptiSpheric(®) IOL PRO optical bench (TRIOPTICS, Wedel, Germany). The lenses have a similar optical design but different near additions: The ReSTOR + 2...
October 12, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28991853/simulated-keratometry-versus-total-corneal-power-by-ray-tracing-a-comparison-in-prediction-accuracy-of-intraocular-lens-power
#3
Giacomo Savini, Kenneth J Hoffer, Domenico Schiano Lomoriello, Pietro Ducoli
PURPOSE: To investigate the relationship between corneal powers measured by simulated keratometry (Sim-K) and ray tracing and understand whether their difference influences intraocular lens (IOL) power calculation. METHODS: In a first sample of healthy eyes, corneal curvature was measured using a rotating Scheimpflug camera (Sirius, CSO). Sim-K was obtained from anterior corneal curvature using the 1.3375 keratometric index. Ray tracing was performed through both corneal surfaces to calculate the total corneal power (TCP)...
November 2017: Cornea
https://www.readbyqxmd.com/read/28991337/accuracy-of-a-new-swept-source-optical-coherence-tomography-biometer-for-iol-power-calculation-and-comparison-to-iolmaster
#4
Giacomo Savini, Kenneth J Hoffer, H John Shammas, Jaime Aramberri, Jinhai Huang, Piero Barboni
PURPOSE: To investigate the accuracy of the measurements provided by a new optical biometer (OA-2000, Tomey Corporation, Nagoya, Japan) for calculating the intraocular lens (IOL) power and to compare the refractive outcomes to those obtained with the IOLMaster 500 (Carl Zeiss Meditec, Jena, Germany). METHODS: In this interventional multicenter study, consecutive patients having cataract surgery were enrolled. Only the IOL model used in the largest sample of patients was selected and the eyes implanted with that IOL were subsequently analyzed...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28985816/infantile-cataract-comparison-of-two-surgical-approaches
#5
Nur Khatib, Erez Tsumi, Amjad Baidousi, Hanan Nussinovitch, Natalya Bilenko, Tova Lifshitz, Jaime Levy
OBJECTIVE: To compare the results of 2 cataract extraction techniques with primary intraocular lens (IOL) implantation in children. DESIGN: Retrospective comparative case series study. METHODS: This study included children with congenital or developmental cataract. In all cases, anterior capsulorhexis, lens aspiration, posterior continuous curvilinear capsulorhexis, and primary IOL implantation were performed. We compared 2 surgical approaches...
October 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28966865/extended-depth-of-focus-intraocular-lens-chromatic-performance
#6
Maria S Millán, Fidel Vega
We describe a first-and-second-diffractive-order intraocular lens ((1(st),2(nd))DIOL) within the class of hybrid refractive-diffractive designs for intraocular lenses (IOLs) and analyse its properties of focus extension and compensation of longitudinal chromatic aberration (LCA), particularly for lenses with low addition. Power, energy efficiency and their wavelength dependence are extended from monofocal IOL and conventional bifocal zeroth-and-first-diffractive-order IOL ((0(th),1(st))DIOL) to (1(st),2(nd))DIOL of low addition...
September 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28956141/-optical-quality-of-three-trifocal-intraocular-lens-models-an-optical-bench-comparison
#7
R Khoramnia, T M Yildirim, T Tandogan, S Liebing, G Łabuz, C Y Choi, G Auffarth
BACKGROUND: Knowledge of the optical quality of different trifocal intraocular lenses (IOL) is important in customized patient care. OBJECTIVE: Different trifocal IOL were compared regarding their optical quality. MATERIALS AND METHODS: We analyzed the FineVision (PhysIOL, Liège, Belgium), the AT LISA tri 839MP (Zeiss, Oberkochen, Germany), and the AcrySofIQ PanOptix (Alcon, Fort Worth, TX, USA) with a power of +21D for the distance using the OptiSpheric IOL PRO optical bench (Trioptics, Wedel, Germany)...
September 27, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28945644/effects-of-contact-lens-wear-on-biometry-measurements-for-intraocular-lens-calculations
#8
Jay J Meyer, Michelle J Kim, Terry Kim
OBJECTIVES: To determine the effects of contact lens (CL) wear on biometry measurements for cataract surgery and whether a CL hiatus can reduce the prediction error of intraocular lens (IOL) calculations. METHODS: Retrospective, interventional case series of eyes that received repeat biometry measurements for IOL calculations after discontinuing hard or soft CLs for at least 14 days. PRIMARY OUTCOME MEASURES: intersession change in axial length, average keratometry, astigmatism, and axis...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28936529/high-performance-flexible-inverted-organic-light-emitting-diodes-by-exploiting-mos2-nanopillar-arrays-as-electron-injecting-and-light-coupling-layers
#9
Kunping Guo, Changfeng Si, Ceng Han, Saihu Pan, Guo Chen, Yanqiong Zheng, Wenqing Zhu, Jianhua Zhang, Chang Sun, Bin Wei
Inverted organic light-emitting diodes (IOLEDs) on plastic substrates have great potential application in flexible active-matrix displays. High energy consumption, instability and poor electron injection are key issues limiting the commercialization of flexible IOLEDs. Here, we have systematically investigated the electrooptical properties of molybdenum disulfide (MoS2) and applied it in developing highly efficient and stable blue fluorescent IOLEDs. We have demonstrated that MoS2-based IOLEDs can significantly improve electron-injecting capacity...
October 5, 2017: Nanoscale
https://www.readbyqxmd.com/read/28917413/biocompatibility-of-intraocular-lens-power-adjustment-using-a-femtosecond-laser-in-a-rabbit-model
#10
Liliana Werner, Jason Ludlow, Jason Nguyen, Joah Aliancy, Larry Ha, Bryan Masino, Sean Enright, Ray K Alley, Ruth Sahler, Nick Mamalis
PURPOSE: To evaluate the biocompatibility (uveal and capsular) of intraocular lens (IOL) power adjustment by a femtosecond laser obtained through increased hydrophilicity of targeted areas within the optic, creating the ability to build a refractive-index shaping lens within an existing IOL. SETTING: John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN: Experimental study. METHODS: Six rabbits had phacoemulsification with bilateral implantation of a commercially available hydrophobic acrylic IOL...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28917408/refractive-outcome-comparison-between-vitreomacular-interface-disorders-after-phacovitrectomy
#11
Zeynep Eylül Ercan, İmren Akkoyun, Eylem Yaman Pınarcı, Gürsel Yılmaz, Hülya Topçu
PURPOSE: To compare the refractive accuracy of intraocular lens (IOL) power calculations between patients with vitreomacular interface disorders who had phacovitrectomy for vitreomacular traction (VMT), epiretinal membranes (ERM), and macular holes. SETTING: Baskent University Department of Ophthalmology, Ankara, Turkey. DESIGN: Retrospective case series. METHODS: Refraction results 8 weeks postoperatively were compared between phacovitrectomy (3 study groups comprising eyes with VMT with intrafoveal pseudocysts, ERM, or medium-to-large macular holes) and phacoemulsification (control group comprising eyes having phacoemulsification only)...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28913996/intraocular-lens-power-calculation-after-refractive-surgery-a-comparative-analysis-of-accuracy-and-predictability
#12
Byeong Soo Kang, Jeong Mo Han, Joo Youn Oh, Mee Kum Kim, Won Ryang Wee
PURPOSE: To compare the accuracy of intraocular lens (IOL) power calculation using conventional regression formulae or the American Society of Cataract and Refractive Surgery (ASCRS) IOL power calculator for previous corneal refractive surgery. METHODS: We retrospectively reviewed 96 eyes from 68 patients that had undergone cataract surgery after keratorefractive surgeries. We calculated the formula with two approaches: IOL powers using the ASCRS IOL power calculator and IOL powers using conventional formulae with previous refractive data (Camellin, Jarade, Savini, and clinical history method) or without prior data (0, 2 and, 4 mm total mean power in topography, Wang-Koch-Maloney, Shammas, Seitz, and Maloney)...
June 29, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28913511/accuracy-of-formulae-for-secondary-intraocular-lens-power-calculations-in-pediatric-aphakia
#13
Fouad R Nakhli, Khaled Emarah, Laila Jeddawi
PURPOSE: To compare the accuracy of axial length vergence formulas versus refractive vergence formulas for secondary intraocular lens (IOL) implantation in pediatric aphakia. METHODS: This retrospective comparative study, evaluated 31 eyes of 31 patients aged ≤3.5 years, who had undergone secondary IOL implantation. The median absolute error (MedAE) was compared between axial length vergence formulas (Hoffer Q, Holladay I, SRK II, and SRK/T) and refractive vergence formulas (Lanchulev, Holladay R, Mackool, and Khan) as well as between formulas within the same vergence...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28905823/refractive-outcomes-of-intraoperative-wavefront-aberrometry-versus-optical-biometry-alone-for-intraocular-lens-power-calculation
#14
Zina Zhang, Logan William Thomas, Szu-Yen Leu, Steven Carter, Sumit Garg
PURPOSE: To compare the outcomes of intraoperative wavefront aberrometry versus optical biometry alone for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery with monofocal IOL implantation. METHODS: Preoperative data were obtained with the IOLMaster. Intraoperative aphakic measurements and IOL power calculations were obtained in some patients with the optiwave refractive analysis (ORA) system. Analysis was performed to determine the accuracy of monofocal IOL power prediction and postoperative manifest refraction at 1 month of the ORA versus IOLMaster...
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28887901/meta-analysis-of-accuracy-of-intraocular-lens-power-calculation-formulas-in-short-eyes
#15
Qiwei Wang, Wu Jiang, Tiao Lin, Xiaohang Wu, Haotian Lin, Weirong Chen
IMPORTANCE: Intraocular lens (IOL) power selection is a critical factor affecting visual outcome after IOL implantation in short eyes. Many formulas have been developed to achieve a precise prediction of the IOL power. However, controversy regarding the accuracy remains. BACKGROUND: To investigate the accuracy of different IOL power calculation formulas in short eyes. DESIGN: Meta-analysis. PARTICIPANTS: Patients with the axial length of eyes less than 22 mm from previously reported studies...
September 9, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28836956/comparison-of-astigmatism-prediction-error-taken-with-the-pentacam-measurements-baylor-nomogram-and-barrett-formula-for-toric-intraocular-lens-implantation
#16
Dae-Young Park, Dong Hui Lim, Sungsoon Hwang, Joo Hyun, Tae-Young Chung
BACKGROUND: To evaluate and compare the astigmatism prediction errors taken with the Pentacam measurements, Baylor nomogram, and Barrett formula for toric intraocular lens (IOL) implantation. METHODS: Phacoemulsification with toric Precizon IOL implantation was performed in 41 eyes with corneal astigmatism (range, 1 to 5 diopters (D)) determined by IOLMaster and SimK on Pentacam. Preoperative corneal astigmatism measurements were obtained from IOLMaster readings (IOLMaster, Baylor-IOLMaster, and Barrett-IOLMaster) and Pentacam readings (SimK, Baylor-SimK, Barrett-SimK, wavefront, true net power, total corneal refractive power, and vector derived by manual vector summation using corneal front and back astigmatism)...
August 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28835226/intraocular-lens-power-calculation-using-standard-formulas-and-ray-tracing-after-dmek-in-patients-with-fuchs-endothelial-dystrophy
#17
Maged Alnawaiseh, Lars Zumhagen, André Rosentreter, Nicole Eter
BACKGROUND: The study presented here aims to optimize the accuracy of intraocular lens (IOL) power calculations in patients after DMEK by evaluation of the impact of the altered anterior/posterior corneal curvature relationship. METHODS: Scheimpflug-based Oculus Pentacam imaging was performed after DMEK surgery for Fuchs endothelial dystrophy. The IOL power was calculated for all patients by ray tracing, aiming for postoperative emmetropia. We also performed the IOL calculation using four third-generation formulas (SRK-T, Hoffer-Q, Holladay-1 and Haigis)...
August 23, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28814826/comparison-between-bilateral-implantation-of-a-trifocal-intraocular-lens-and-blended-implantation-of-two-bifocal-intraocular-lenses
#18
César Vilar, Wilson Takashi Hida, André Lins de Medeiros, Klayny Rafaella Pereira Magalhães, Patrick Frensel de Moraes Tzelikis, Mario Augusto Pereira Dias Chaves, Antônio Francisco Pimenta Motta, Pedro Carlos Carricondo, Milton Ruiz Alves, Walton Nosé
PURPOSE: To compare visual outcomes and performance between bilateral implantation of a diffractive trifocal intraocular lens (IOL) Acrysof(®)PanOptix(®) TFNT00 and blended implantation of two different near add power bifocal IOLs: Acrysof(®) Restor(®) SV25T0 in dominant eye and Acrysof(®) Restor(®) SN6AD1 in the nondominant eye. METHODS: This prospective, nonrandomized, consecutive and comparative study assessed 20 patients (40 eyes) who had bilateral cataract surgery performed using the IOLs described...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28808644/the-comparative-study-of-refractive-index-variations-between-haigis-srk-t-and-hoffer-q-formulas-used-for-preoperative-biometry-calculation-in-patients-with-the-axial-length-25-mm
#19
Hasan Razmjoo, Hosein Atarzadeh, Neda Kargar, Mohammad Behfarnia, Kobra Nasrollahi, Ali Kamali
BACKGROUND: To compare refractive index variation between Hoffer-Q, Haigis and SRK/T formulas used for preoperative biometry calculation in patients with axial length >25 mm, undergoing cataract surgery. MATERIALS AND METHODS: This is a randomized clinical trial study was performed on 54 eyes of 54 patients with ages of 40-70 years old and axial length >25 mm classified into three groups that their IOL POWER were calculated by Haigis, SRK/T and Hoffer-Q formulas before undergoing cataract surgery...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28791060/outcome-of-single-piece-intraocular-lens-sulcus-implantation-following-posterior-capsular-rupture-during-phacoemulsification
#20
Masomeh Mohebbi, Seyed Ali Bashiri, Seyed Farzad Mohammadi, Behnaz Samet, Fariba Ghassemi, Elham Ashrafi, Fatemeh Bazvand
PURPOSE: To assess the safety and outcome of single-piece posterior chamber intraocular lens (PC-IOL) implantation in the ciliary sulcus following posterior capsular rupture during cataract surgery. METHODS: Patients with posterior capsular rupture during cataract surgery with a single-piece acrylic IOL implanted into the ciliary sulcus were studied. Complete ocular examinations were performed after 6 months postoperatively. RESULTS: Twenty-four eyes were included...
July 2017: Journal of Ophthalmic & Vision Research
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