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https://www.readbyqxmd.com/read/29227507/the-use-of-capsular-tension-rings-to-reduce-refractive-shift-in-patients-with-implantation-of-trifocal-intraocular-lenses
#1
Kristin Nistad, Frida Göransson, Eivind Støle, Hossein Shams, Björn Gjerdrum
PURPOSE: To determine whether use of a capsular tension ring (CTR) can increase refractive stability in patients with implantation of two different trifocal intraocular lenses (IOLs). METHODS: A prospective, consecutive series of eyes underwent refractive lens exchange with implantation of two different trifocal IOL designs: FineVision Micro F (non-toric) and FineVision POD FT (toric) (PhysIOL, Liege, Belgium). Power calculation was determined using the Haigis formula...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29227506/comparison-of-methodologies-using-estimated-or-measured-values-of-total-corneal-astigmatism-for-toric-intraocular-lens-power-calculation
#2
Tiago B Ferreira, Paulo Ribeiro, Filomena J Ribeiro, João G O'Neill
PURPOSE: To compare the prediction error in the calculation of toric intraocular lenses (IOLs) associated with methods that estimate the power of the posterior corneal surface (ie, Barrett toric calculator and Abulafia-Koch formula) with that of methods that consider real measures obtained using Scheimpflug imaging: a software that uses vectorial calculation (Panacea toric calculator: http://www.panaceaiolandtoriccalculator.com) and a ray tracing software (PhacoOptics, Aarhus Nord, Denmark)...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29208827/optimizing-optical-outcomes-of-intraocular-lens-implantation-by-achieving-centration-on-visual-axis
#3
Prakhyat Roop
In existing designs of intraocular lenses (IOLs), optical outcomes are compromised even after perfectly executed surgery. The reason for this is misalignment of optical axis of the eye and its visual axis. There is a need to design an IOL which compensates for this misalignment and hence enhances the optical outcomes of cataract surgery. The present innovation attempts to fulfill this unmet need and optimizes optical outcomes of all IOLs of different optical profiles - spherical, aspheric, toric, and multifocal...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29208810/optimizing-outcomes-with-toric-intraocular-lenses
#4
REVIEW
Manpreet Kaur, Farin Shaikh, Ruchita Falera, Jeewan S Titiyal
Toric intraocular lenses (IOLs) are the procedure of choice to correct corneal astigmatism of 1 D or more in cases undergoing cataract surgery. Comprehensive literature search was performed in MEDLINE using "toric intraocular lenses," "astigmatism," and "cataract surgery" as keywords. The outcomes after toric IOL implantation are influenced by numerous factors, right from the preoperative case selection and investigations to accurate intraoperative alignment and postoperative care. Enhanced accuracy of keratometry estimation may be achieved by taking multiple measurements and employing at least two separate devices based on different principles...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29142886/toric-intraocular-lens-for-astigmatism-correction-in-cataract-patients
#5
Hassan Razmjoo, Mohammad Ghoreishi, Azadeh Mohammadi Milasi, Alireza Peyman, Zahra Jafarzadeh, Mohadeseh Mohammadinia, Nasrollahi Kobra
Background: To assess the clinical consequences of AcrySof toric intraocular lens (IOL) and Hoya toric IOL implantation to correct preexisting corneal astigmatism in patients undergoing cataract surgery. Materials and Methods: In this study, we examined 55 eyes of 45 patients with at least 1.00 D corneal astigmatism who were scheduled for cataract surgery. After phacoemulsification, toric IOL was inserted and axis was aligned. We observed the patients, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), keratometry, manifest refraction, and IOL axis alignment 6 months after surgery...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/29120720/advanced-cataract-learning-experience-in-united-states-ophthalmology-residency-programs
#6
Adam J Yen, Saras Ramanathan
This study examined resident exposure to and competency in new techniques for cataract removal and intraocular lens (IOL) implantation. A questionnaire was sent to 116 United States ophthalmology program directors and completed by 71. In response to the questionnaire, program directors reported that 95.3% of their graduating seniors were competent to select and implant toric IOLs and 52.3% were competent to implant capsular tension rings (CTRs). Divide and conquer (56.6%) and stop and chop (25.4%) dominated phacoemulsification teaching...
October 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29118504/bilateral-early-capsular-block-syndrome-following-implantation-of-the-new-trifocal-toric-lens
#7
Ashbala Khattak
A young patient underwent phacoemulsification with endocapsular implantation of trifocal toric lens in both eyes (AT LISA tri toric 939 MP, Carl-Zeiss, Germany). One-week postsurgery, he developed capsular block syndrome (CBS) in both eyes. There was deterioration of uncorrected visual acuity at 1-week postsurgery, with a myopic shift of 2.5 diopters (D) in the right eye and 2.0 D in the left eye. The intraocular pressure was only elevated in the left eye. Neodymium: yttrium-aluminum-garnet laser posterior capsulotomy resolved the block successfully in both eyes...
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29094301/vertical-implantable-collamer-lens-icl-rotation-for-the-management-of-high-vault-due-to-lens-oversizing
#8
Francesco Matarazzo, Alexander Clifford Day, Luis Fernandez-Vega Cueto, Vincenzo Maurino
PURPOSE: To describe the good outcome of implantable collamer lens (ICL) rotation to reduce post-operative vault. METHODS: Retrospective analysis of case report. A 43-year-old woman had V4c EVO + myopic non-toric ICL implantation and post-operatively she presented with anisocoria and high vault. She underwent surgery to rotate the ICL 90 degrees to a vertical orientation. RESULTS: We achieved a reduction in the vault from 1020 to 486 μm after vertical ICL rotation...
November 1, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29084004/astigmatism-evaluation-prior-to-cataract-surgery
#9
Pankaj C Gupta, Jane T Caty
PURPOSE OF REVIEW: To evaluate and summarize literature from the past 18 months reporting advancements and issues in astigmatism assessment prior to cataract surgery. RECENT FINDINGS: New and updated toric calculators and regression formulas offer the opportunity for more accurate lens selection for our patients. Concurrently, improvements in topographic evaluation of corneal keratometry have allowed for a decrease in unplanned residual corneal astigmatism. Measuring posterior corneal astigmatism is especially valuable in eyes with keratoconus when planning to implant toric intraocular lens (IOL) and now allows access to this patient population...
January 2018: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/29056301/comparison-of-visual-outcomes-alignment-accuracy-and-surgical-time-between-2%C3%A2-methods-of-corneal-marking-for-toric-intraocular%C3%A2-lens-implantation
#10
Wolfgang J Mayer, Thomas Kreutzer, Martin Dirisamer, Christoph Kern, Karsten Kortuem, Efstathios Vounotrypidis, Siegfried Priglinger, Daniel Kook
PURPOSE: To compare the efficacy of a computer-assisted marker system for toric intraocular lenses (IOLs) (Callisto Eye System) with manual marking techniques. SETTING: University Eye Hospital Munich, Ludwig-Maximilians-University, Munich, Germany. DESIGN: Prospective case series. METHODS: This study included patients having cataract surgery with implantation of a toric IOL (Torbi 709 M). They were randomly assigned to 1 of 2 groups based on the marking system used, manual or digital...
October 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29042749/a-review-of-results-after-implantation-of-a-secondary-intraocular-lens-to-correct-residual-refractive-error-after-cataract-surgery
#11
Kjell Gunnar Gundersen, Rick Potvin
PURPOSE: The purpose of this study was to provide clinical outcomes data related to secondary intraocular lens (IOL) implantation for the correction of residual refractive error after cataract surgery. PATIENTS AND METHODS: A chart review was conducted to identify all eyes implanted with the monofocal spherical or toric AddOn(®) secondary IOL. Data were collated from charts where uncomplicated initial cataract surgery was completed. Measures of interest included the original IOL implanted, the postoperative refractive error (before secondary IOL implantation) and the associated corrected and uncorrected visual acuities (VAs)...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28991609/optimized-keratometry-and-total-corneal-astigmatism-for-toric-intraocular-lens-calculation
#12
Giacomo Savini, Kristian Næser, Domenico Schiano-Lomoriello, Pietro Ducoli
PURPOSE: To compare keratometric astigmatism (KA) and different modalities of measuring total corneal astigmatism (TCA) for toric intraocular lens (IOL) calculation and optimize corneal measurements to eliminate the residual refractive astigmatism. SETTING: G.B. Bietti Foundation IRCCS, Rome, Italy. DESIGN: Prospective case series. METHODS: Patients who had a toric IOL were enrolled. Preoperatively, a Scheimpflug camera (Pentacam HR) was used to measure TCA through ray tracing...
September 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28991336/four-stage-procedure-for-keratoconus-icrs-implantation-corneal-cross-linking-toric-phakic-intraocular-lens-implantation-and-topography-guided-photorefractive-keratectomy
#13
Efekan Coskunseven, Daya Papalkar Sharma, Michael A Grentzelos, Onurcan Sahin, George D Kymionis, Ioannis Pallikaris
PURPOSE: To evaluate a four-stage combined treatment for keratoconus including intrastromal corneal ring segment (ICRS) implantation followed by corneal cross-linking (CXL), toric phakic intraocular lens (IOL) implantation, and topography-guided photorefractive keratectomy (TG-PRK). METHODS: In this retrospective interventional case series, 11 eyes of 7 patients with progressive keratoconus were treated with a four-stage procedure including the following: Keraring ICRS (Mediphacos Ltda, Belo Horizonte, Brazil) implantation followed by CXL, phakic IOL implantation, and TG-PRK (minimum 6 months between each stage)...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28988643/a-novel-fitting-algorithm-for-alignment-curve-radius-estimation-using-corneal-elevation-data-in-orthokeratology-lens-trial
#14
Lu Zhang, Yue Zhang, Yanlin Liu, Kai Wang, Mingwei Zhao
PURPOSE: To evaluate a novel fitting algorithm for estimation of alignment curve (AC) radius during orthokeratology lens trial. METHODS: Fifty myopic children were recruited in this study. AC radii were estimated by both traditional method using flat K readings and eccentricity values and by a novel fitting algorithm, which was composed of 256 circle fittings using corneal elevation data from the corresponding AC region and a succedent toric fitting based on these calculated AC curvatures...
October 4, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28961565/cataract-surgery-in-eyes-with-keratoconus-a-review-of-the-current-literature
#15
Majid Moshirfar, Brian D Walker, Orry C Birdsong
PURPOSE OF REVIEW: There are an increasing number of keratoconic eyes, requiring cataract surgery. We review the preoperative planning, intraoperative options, and postoperative management that aid in successful outcomes. RECENT FINDINGS: Management of keratoconic eyes requiring cataract surgery requires a multifaceted approach. Preoperatively, corneal crosslinking and intrastromal corneal ring segments can be considered in order to provide stable keratometry values for intraocular lens (IOL) calculations...
January 2018: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28953492/descemet-membrane-endothelial-keratoplasty-in-eyes-with-previous-laser-refractive-surgery-outcomes-and-complications
#16
Dorian A Zeidenweber, Zachary M Mayko, Michael D Straiko, Mark A Terry
PURPOSE: To evaluate the refractive predictability and efficacy of Descemet membrane endothelial keratoplasty (DMEK) for patients with previous laser refractive surgery. METHODS: We retrospectively reviewed our cohort of endothelial keratoplasty surgical cases. We identified 21 eyes that underwent laser-assisted in situ keratomileusis (n = 17) or photorefractive keratectomy (n = 4) and were treated with DMEK for endothelial failure. Patients were analyzed preoperatively and at 6 months postoperatively for changes in visual acuity, refraction, and corneal topography...
November 2017: Cornea
https://www.readbyqxmd.com/read/28945646/efficacy-of-toric-contact-lenses-in-fitting-and-patient-reported-outcomes-in-contact-lens-wearers
#17
Stephanie M Cox, David A Berntsen, Katherine M Bickle, Jessica H Mathew, Daniel R Powell, B Kim Little, Kathrine Osborn Lorenz, Jason J Nichols
OBJECTIVES: To assess whether patient-reported measures are improved with soft toric contact lenses (TCLs) compared with soft spherical contact lenses (SCLs) and whether clinical time needed to fit TCL is greater than SCL. METHODS: Habitual contact lens wearers with vertexed spherical refraction +4.00 to +0.25 D or -0.50 to -9.00 D and cylinder -0.75 to -1.75 DC were randomly assigned to be binocularly fitted into a TCL or SCL, and masked to treatment assignment...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28945644/effects-of-contact-lens-wear-on-biometry-measurements-for-intraocular-lens-calculations
#18
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/28932335/cataract-surgery-in-patients-with-keratoconus-pearls-and-pitfalls
#19
F Aiello, Q J Nasser, C Nucci, R I Angunawela, Z Gatzioufas, V Maurino
BACKGROUND: Keratoconus (KC) is a common ectatic disorder resulting in progressive corneal thinning and irregular astigmatism. It has been observed that patients affected by KC are more likely to develop lens opacities earlier compared to non-keratoconic patients. OBJECTIVE: Intraocular lens (IOL) selection and refractive outcome prediction are among a number of factors that can make cataract surgery in keratoconic patients challenging. Accurate biometry is often difficult to obtain due to unreliable K measurements and lack of dedicated biometric formulae...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28931181/-refractive-lens-exchange
#20
Fritz H Hengerer, Ina Conrad-Hengerer
In refractive surgery the removal of the natural lens followed by implantation of an artificial intraocular lens has been an established method to treat refractive errors. The term "clear lens exchange" separates this approach from cataract surgery, where a cloudy lens has to be removed. With regard to currently available intraocular lens technologies, there is a wide range to correct myopia, hyperopia as well as astigmatism. Trifocal or extended depth-of-focus lenses (EDOF) even with a toric component offer the patients a potential benefit to further address presbyopia, respectively...
October 2017: Klinische Monatsblätter Für Augenheilkunde
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