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Intraocular lenses

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https://www.readbyqxmd.com/read/27913863/-multifocal-intraocular-lens-miol-surgery-in-young-non-presbyopic-ametropes-reasonable-and-safe
#1
A Frings, J Steinberg, S J Linke, V Druchkiv, T Katz
BACKGROUND: Refractive lens exchange and implantation of a multifocal intraocular lens (MIOL) is mainly advised for ametropes with presbyopia. Non-presbyopic young ametropes who wish spectacle-independence are usually treated with corneal refractive surgery or phakic lenses. OBJECTIVES: This retrospective case series aimed to analyse the refractive and subjective satisfaction outcome after MIOL surgery in both eyes of non-presbyopic ametropes where other treatment options were not possible...
December 2, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27898450/update-on-treating-high-myopia-with-implantable-collamer-lenses
#2
Xiaoying Wang, Xingtao Zhou
The purpose of this article is to provide updates on the treatment of high myopia with the implantable collamer lens (ICL). The ICL has become an important technique used in intraocular refractive surgery. With improvements in material, design, and application, the ICL has good efficacy, predictability, long-term safety and stability, manageable complications, and reversibility. More and more refractive surgeons are taking note of the ICL. This article reviews the material characteristics and the latest designs of the ICL along with the clinical applications, visual quality, and future development...
November 2016: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/27895981/perceived-image-quality-with-simulated-segmented-bifocal-corrections
#3
Carlos Dorronsoro, Aiswaryah Radhakrishnan, Pablo de Gracia, Lucie Sawides, Susana Marcos
Bifocal contact or intraocular lenses use the principle of simultaneous vision to correct for presbyopia. A modified two-channel simultaneous vision simulator provided with an amplitude transmission spatial light modulator was used to optically simulate 14 segmented bifocal patterns (+ 3 diopters addition) with different far/near pupillary distributions of equal energy. Five subjects with paralyzed accommodation evaluated image quality and subjective preference through the segmented bifocal corrections. There are strong and systematic perceptual differences across the patterns, subjects and observation distances: 48% of the conditions evaluated were significantly preferred or rejected...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27843290/vector-analysis-investigation-of-toric-intraocular-lens-with-no-deviation-from-the-intended-axis
#4
Atsushi Kawahara, Yoshinori Takayanagi
AIM: The aim of this research was to evaluate vector analysis after implantation of toric intraocular lenses (IOLs) without deviation from the intended axis. METHODS: The study included 18 eyes of 16 patients who underwent cataract surgery with the insertion of a toric implant (AcrySof IQ Toric). The postoperative IOL meridian placement completely corresponded to that planned. Using vector analysis, surgically induced astigmatism (SIA) was derived from the refractive outcome versus the predicted postoperative keratometric astigmatism and was compared with targeted induced astigmatism (TIA)...
2016: Clinical Ophthalmology
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
#5
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/27828894/rotationally-asymmetric-multifocal-intraocular-lenses-preoperative-considerations-and-postoperative-outcomes
#6
Jonathan E Moore, Richard N McNeely, Eric E Pazo, Tara C B Moore
PURPOSE OF REVIEW: The manuscript presents a review of recently published studies reporting objective and subjective outcomes and preoperative considerations of asymmetrical multifocal intraocular lenses (IOLs). RECENT FINDINGS: Current publications suggest that asymmetrical multifocal IOLs provide good, distance, intermediate and near vision for cataract and clear lens extraction patients. The contrast sensitivity achieved is similar to monofocal IOLs. Photopic phenomenon such as glare and halos has been reduced through the use of these IOLs leading to better patient satisfaction...
January 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/27826052/time-trends-in-cataract-surgery-and-after-cataract-laser-capsulotomy-in-taiwan-a-population-based-retrospective-cohort-study
#7
Jiahn-Shing Lee, Chia-Chi Chung, Ken-Kuo Lin, Kuang-Hui Yu, Chang-Fu Kuo, Lai-Chu See
OBJECTIVES: Determine the incidence rate, risk factors, and time trends from 2000 to 2010 for cataract surgery and after-cataract laser capsulotomy. MATERIALS AND METHODS: Longitudinal Health Insurance Databases (LHID) with approximately 3 million people in Taiwan National Health Insurance Program from 2000, 2005, and 2010 was used. Index year was defined as year 2000 for LHID2000, year 2005 for LHID2005, and year 2010 for LHID2010. RESULTS: The age-standardized rate of first-eye cataract surgery per 100,000 persons was 324 (95% confidence interval [CI] = 288-363) in 2000, 317 (95%CI = 288-353) in 2005, and 342 (95%CI = 308-379) in 2010...
November 5, 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27824378/nd-yag-capsulotomy-rates-with-two-trifocal-intraocular-lenses
#8
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/27824377/visual-performance-in-the-long-term-with-secondary-add-on-versus-primary-capsular-bag-multifocal-intraocular-lenses
#9
Jens Schrecker, Achim Langenbucher
PURPOSE: To compare the long-term results of a secondary sulcus-placed, multifocal add-on intraocular lens (IOL) with those of a multifocal IOL implanted in the capsular bag. METHODS: In this prospective clinical trial, 30 pseudophakic eyes were treated with a multifocal add-on IOL and 30 cataractous eyes with a standard multifocal IOL. The main outcome measures comprised manifest refraction, visual acuity, defocus curves, and contrast sensitivity. Patients who had bilateral implantation of the same lens type were asked to complete a questionnaire...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27822628/-toric-add-on-intraocular-lenses-for-correction-of-high-astigmatism-after-pseudophakic-keratoplasty
#10
A Hassenstein, F Niemeck, K Giannakakis, M Klemm
Perforating keratoplasty shows good morphological results with a clear cornea; however, a limiting factor is often the resulting astigmatism, which cannot be corrected with either glasses or contact lenses (CL) in up to 20% of the patients. We retrospectively investigated 15 patients after pseudophakic perforating keratoplasty, who received implantation of toric add-on intraocular lenses (IOL) to correct astigmatism. The mean preoperative astigmatism of 6.5 diopter (dpt) could be reduced to a mean postoperative value of 1...
November 7, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27805532/visual-rehabilitation-after-penetrating-keratoplasty
#11
Leyla Asena, Dilek D Altınörs
OBJECTIVES: Here, our aim was to report our treatment strategies and their results performed for visual rehabilitation after penetrating keratoplasty. MATERIALS AND METHODS: The medical records of 98 patients (54 male/44 female), with results from 104 eyes, who underwent penetrating keratoplasty between January 2013 and January 2015 at the Baskent University Faculty of Medicine, Department of Ophthalmology were reviewed. Patient age, indication for penetrating keratoplasty, interventions performed for visual rehabilitation, follow-up duration, topographic and refractive astigmatism at the end of follow-up, and final best corrected visual acuity results were recorded...
November 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27795795/cataract-surgery-with-intraocular-lens-implantation-in-children-aged-5-15-in-local-anaesthesia-visual-outcomes-and-complications
#12
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/27787410/calcification-of-a-hydrophilic-acrylic-intraocular-lens-after-pars-plana-vitrectomy
#13
Rahul N Khurana, Liliana Werner
PURPOSE: Anterior surface calcification of a hydrophilic acrylic intraocular lens (IOL) associated with iatrogenic exposure of air after an uncomplicated pars plana vitrectomy is described. METHODS: The clinical and histochemical findings of a patient who developed postoperative opacification of a hydrophilic acrylic intraocular lens are retrospectively reviewed. RESULTS: A 63-year-old woman developed fine granular opacifications on the anterior surface of the intraocular lens 8 months after a pars plana vitrectomy with iatrogenic exposure of air...
October 25, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27784985/causes-and-correction-of-dissatisfaction-after-implantation-of-presbyopia-correcting-intraocular-lenses
#14
Allister Gibbons, Tayyeba K Ali, Daniel P Waren, Kendall E Donaldson
PURPOSE: The purpose of this study was to assess the causes and possible solutions for patient dissatisfaction after the implantation of presbyopia-correcting intraocular lenses (IOLs). METHODS: This study was a retrospective review of clinical records. All patients who were seen between January 2009 and December 2013 whose primary reason for consultation was dissatisfaction with visual performance after presbyopia-correcting IOL implantation were included in the study...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27777828/psychophysical-vision-simulation-of-diffractive-bifocal-and-trifocal-intraocular-lenses
#15
Wolfgang Brezna, Kirsten Lux, Nikolaus Dragostinoff, Christian Krutzler, Nicole Plank, Rainer Tobisch, Agnes Boltz, Gerhard Garhöfer, Reinhard Told, Katarzyna Witkowska, Leopold Schmetterer
PURPOSE: The visual performance of monofocal, bifocal, and trifocal intraocular lenses was evaluated by human individuals using a vision simulator device. This allowed investigation of the visual impression after cataract surgery, without the need actually to implant the lenses. METHODS: The randomized, double-masked, three-way cross-over study was conducted on 60 healthy male and female subjects aged between 18 and 35 years. Visual acuity (Early Treatment Diabetic Retinopathy Study; ETDRS) and contrast sensitivity tests (Pelli-Robson) under different lighting conditions (luminosities from 0...
October 2016: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/27776330/rp-hplc-detection-and-dosage-method-for-acrylic-monomers-and-degradation-products-released-from-implanted-medical-devices
#16
Lionel Tortolano, Senda Hammami, Katia Manerlax, Bernard Do, Najet Yagoubi
Acrylic copolymers are useful in medical therapeutics. As in dental implants or intraocular lenses, acrylics are present in many medical devices or drug adjuvants. Industrial using of acrylics is still important in painting or textile manufacturing. Scientific research background has proved that acrylic suffer for depolymerized and cross-linking mechanisms under heating and photo-oxidative conditions. Those aging processes could lead to release of unreacted monomers and degradation products. We developed a new RP-HPLC method with good resolution, recovery, linearity, detection and quantification limits that is efficient for acrylic monomers quantification in in vitro and in vivo saline solution matrices...
October 18, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27776082/effect-of-decentration-on-the-optical-quality-of-two-intraocular-lenses
#17
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
#18
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/27764023/sustained-drug-delivery-for-glaucoma-current-data-and-future-trends
#19
Ahmad A Aref
PURPOSE OF REVIEW: Sustained drug delivery has been recognized as a need for patients with ocular hypertension or glaucomatous optic neuropathy. Several sustained drug delivery systems and devices are currently on the horizon. This review aims to summarize initial results with these platforms, as reported in the literature, and also provide insight into their possible role in the glaucoma treatment paradigm. RECENT FINDINGS: Sustained drug delivery systems currently on the horizon include the topical bimatoprost ocular insert, travoprost and latanoprost punctal plugs, latanoprost-eluting contact lenses, bimatoprost and travoprost intraocular implants, as well as several other therapies in earlier stages of development...
October 19, 2016: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/27760270/degradation-of-visual-performance-with-increasing-levels-of-retinal-stray-light
#20
Marrie van der Mooren, Robert Rosén, Luuk Franssen, Linda Lundström, Patricia Piers
Purpose: To quantify the effect of induced stray light on halo size, luminance threshold, and contrast sensitivity. Methods: Retinal stray light was induced in five healthy subjects using different photographic filters. The stray light induced ranged from levels observed in intraocular lenses (IOLs) with glistenings (low) to cataract level (high). The visual impact was measured for halo size, luminance detection threshold, and contrast sensitivity with and without a glare source...
October 1, 2016: Investigative Ophthalmology & Visual Science
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