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Phakic IOL

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https://www.readbyqxmd.com/read/29214075/air-bubble-technique-for-fundus-visualization-during-vitrectomy-in-aphakia
#1
Mahmoud Mohamed Farouk, Takeshi Naito, Mohammed Elagouz, Hatem Ammar, Alahmady Hamad Alsmman, Engy Mohamed Mostafa
Purpose: To evaluate the efficacy and safety of air bubble technique for vitrectomy in aphakia. Study Design: Prospective interventional uncontrolled case series. Methods: This study included 53 eyes of 53 patients who are phakic and indicated for phacovitrectomy (7 eyes, group 1), aphakic and indicated for vitrectomy (22 eyes, group 2), or underwent unplanned vitrectomy for immediate management of a phacoemulsification surgery complicated by rupture posterior capsule with dropped nucleus, fragments, or IOL (24 eyes, group 3)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29117412/in-vivo-measurement-of-longitudinal-chromatic-aberration-in-patients-implanted-with-trifocal-diffractive-intraocular-lenses
#2
Maria Vinas, Ana Gonzalez-Ramos, Carlos Dorronsoro, Vyas Akondi, Nuria Garzon, Francisco Poyales, Susana Marcos
PURPOSE: To measure the longitudinal chromatic aberration (LCA) by both psychophysical methods and in vivo double-pass retinal imaging in patients bilaterally implanted with trifocal diffractive intraocular lenses (IOLs). METHODS: Measurements were performed with a polychromatic adaptive optics system provided with a supercontinuum laser, a Hartmann-Shack wavefront sensor, a deformable mirror, a motorized Badal system, a pupil monitoring system, a double-pass retinal imaging channel, and a psychophysical channel with monochromatically illuminated stimuli...
November 1, 2017: Journal of 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
#3
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/28882754/mini-review-far-peripheral-vision
#4
Michael J Simpson
The region of far peripheral vision, beyond 60 degrees of visual angle, is important to the evaluation of peripheral dark shadows (negative dysphotopsia) seen by some intraocular lens (IOL) patients. Theoretical calculations show that the limited diameter of an IOL affects ray paths at large angles, leading to a dimming of the main image for small pupils, and to peripheral illumination by light bypassing the IOL for larger pupils. These effects are rarely bothersome, and cataract surgery is highly successful, but there is a need to improve the characterization of far peripheral vision, for both pseudophakic and phakic eyes...
September 9, 2017: Vision Research
https://www.readbyqxmd.com/read/28880334/a-multicenter-retrospective-survey-of-refractive-surgery-in-78-248-eyes
#5
Kazutaka Kamiya, Akihito Igarashi, Ken Hayashi, Kazuno Negishi, Masaki Sato, Hiroko Bissen-Miyajima
PURPOSE: To retrospectively evaluate the current practice, trends, and outcomes of refractive surgery in Japan. METHODS: This multicenter survey comprised 78,248 eyes of 39,727 consecutive patients who underwent refractive surgery at 45 major institutions in Japan. The corresponding ophthalmologists responded to a selfadministered questionnaire. The authors especially evaluated the safety, efficacy, predictability, stability, and adverse events of LASIK and phakic intraocular lens (IOL) implantation 3 months postoperatively...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28732607/refractive-outcomes-and-complications-after-combined-copolymer-phakic-intraocular-lens-explantation-and-phacoemulsification-with-intraocular-lens-implantation
#6
Paolo G Meier, François Majo, Philippe Othenin-Girard, Ciara Bergin, Ivo Guber
PURPOSE: To assess safety, efficacy, and predictability of combined Implantable Collamer Lens phakic intraocular lens (pIOL) explantation and phacoemulsification and to report the rate of complications. A secondary aim was to examine whether intraocular lens (IOL) power calculation was affected by the pIOL in situ. SETTING: Jules-Gonin Eye Hospital, Lausanne, Switzerland. DESIGN: Retrospective case series. METHODS: The records of patients having pIOL implantation with subsequent phacoemulsification were reviewed...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28586504/removal-of-persistent-cellular-deposits-after-foldable-iris-fixated-phakic-iol-implantation
#7
Marilia Lordello Passos, Ramon Coral Ghanem, Vinícius Coral Ghanem
PURPOSE: To report a case of severe recurrent cellular deposits after Artiflex intraocular lens (Ophtec B. V., Groningen, The Netherlands) implantation. METHODS: Case report. RESULTS: A 25-year-old woman underwent uneventful Artiflex intraocular lens implantation in both eyes. After 3 months, severe cellular deposits were seen in the posterior surface of the lens in one eye. Topical steroids were administered, with temporary improvement. Four months later, the deposits recurred and did not respond to topical steroids...
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
#8
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/28486732/phake-intraokularlinsen
#9
Fritz H Hengerer, Ina Conrad-Hengerer
Implanting phakic IOLs (PIOLs) in phakic eyes is regarded as an established option in refractive surgery for many years when treating high myopia, hyperopia or ametropia. Even for eyes which show a combination of refractive errors (including astigmatism) this can be an appropriate option. The surgery itself requires certain anatomical and refractive requirements, since, as with any intraocular procedure, there are different possibilities of complication depending on the chosen IOL. Therefore, any potential candidate for refractive surgery should be treated in accordance with the current recommendations of the German "Commission Refractive Surgery" (KRC) to achieve the best possible refractive outcome with maximum safety for patient and surgeon...
August 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28432184/management-of-a-case-of-myopic-foveoschisis-with-phakic-intraocular-lens-piol-in-situ-intraoperative-challenges
#10
Atul Kumar, Aditi Mehta, Raghav Dinesh Ravani, Prateek Kakkar
We describe the case of a 30-year-old man with pathological myopia with a phakic intraocular lens (IOL) (Visian ICL V4c model; STAAR, Monrovia, California, USA) in situ having complaints of metamorphopsia in the left eye with documented myopic foveoschisis on swept-source optical coherence tomography (DRI OCT Triton; Topcon, Tokyo, Japan). The patient underwent pars plana vitrectomy with internal limiting membrane peeling. This report discusses the intraoperative challenges occurring as a result of increased optical aberrations in the presence of a phakic IOL...
April 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28407168/intraoperative-optical-coherence-tomography-vault-measurement-in-posterior-chamber-phakic-intraocular-lens-implantation
#11
Tien-En Tan, Yu-Chi Liu, Lasitha Saroj Jayasinghe, Jodhbir S Mehta
PURPOSE: To describe the use of intraoperative optical coherence tomography (OCT) vault measurement in 5 cases of posterior chamber phakic intraocular lens (IOL) implantation. METHODS: This case series included 5 eyes in 3 consecutive patients undergoing phakic IOL implantation. RTVue OCT (Optovue, Inc., Fremont, CA) was used to obtain intraoperative vault measurements after pupil constriction. Visante OCT (Carl Zeiss Meditec, Jena, Germany) was used to obtain postoperative vault measurements...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28407164/intraocular-pressure-after-implantation-of-a-phakic-collamer-intraocular-lens-with-a-central-hole
#12
Ignacio Rodríguez-Una, Pedro Pablo Rodríguez-Calvo, Luis Fernández-Vega Cueto, Carlos Lisa, Andrés Fernández-Vega Cueto, José F Alfonso
PURPOSE: To investigate the middle-term intraocular pressure (IOP) results after implantation of a posterior chamber collagen copolymer phakic intraocular lens (IOL) (V4c Visian; STAAR Surgical Co., Nidau, Switzerland) with a central hole in patients with myopia. METHODS: This retrospective study enrolled patients who had implantation of a phakic IOL with a central hole. IOP, central vault, and adverse events were evaluated 1, 3, 6, 12, and 24 months postoperatively...
April 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28399068/descemet-membrane-endothelial-keratoplasty-and-refractive-surgery
#13
REVIEW
C Maya Tong, Lamis Baydoun, Gerrit R J Melles
PURPOSE OF REVIEW: Descemet membrane endothelial keratoplasty (DMEK) has become a first-line treatment in corneal endothelial diseases because of its exceptional clinical outcomes and low complication rates. Because of its improved refractive predictability, DMEK is now also considered for managing cases with endothelial decompensation following previous refractive procedures, or in combination with those. This article reviews the clinical outcomes in these cases and discusses the possibility of refractive interventions following DMEK...
July 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28366376/negative-dysphotopsia-causes-and-rationale-for-prevention-and-treatment
#14
Jack T Holladay, Michael J Simpson
PURPOSE: To determine the cause of negative dysphotopsia using standard ray-tracing techniques and identify the primary and secondary causative factors. SETTING: Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA. DESIGN: Experimental study. METHODS: Zemax ray-tracing software was used to evaluate pseudophakic and phakic eye models to show the location of retinal field images from various visual field objects...
February 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28114313/the-relationship-between-crystalline-lens-power-and-refractive-error-in-older-chinese-adults-the-shanghai-eye-study
#15
Jiangnan He, Lina Lu, Xiangui He, Xian Xu, Xuan Du, Bo Zhang, Huijuan Zhao, Jida Sha, Jianfeng Zhu, Haidong Zou, Xun Xu
PURPOSE: To report calculated crystalline lens power and describe the distribution of ocular biometry and its association with refractive error in older Chinese adults. METHODS: Random clustering sampling was used to identify adults aged 50 years and above in Xuhui and Baoshan districts of Shanghai. Refraction was determined by subjective refraction that achieved the best corrected vision based on monocular measurement. Ocular biometry was measured by IOL Master...
2017: PloS One
https://www.readbyqxmd.com/read/28096654/comparison-of-visian-toric-collamer-lens-and-toric-acrylic-intraocular-lens-implantation-for-the-treatment-of-myopia-with-astigmatism
#16
Hatem Ammar, Mohamed Anbar, Marwa M Abdellah
PURPOSE: To compare the efficacy and outcome of phakic toric implantable collamer lens (TICL) and refractive clear lens extraction with AcrySof Toric intraocular lens (TIOL) implantation for the treatment of myopic astigmatism. PATIENTS AND METHODS: This study assessed eyes with myopic astigmatism >-1 D and ≤-4 D with a spherical equivalent >10 D or <10 D if the patients were unsuitable for corneal refractive surgery. These eyes were divided into group A, in which Visian Toric ICL™ Phakic TICL was implanted, and group B, which involved clear lens extraction with implantation of an AcrySof IQ toric SN60T3-9™ IOL...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28034710/a-multicenter-prospective-cohort-study-on-refractive-surgery-in-15-011-eyes
#17
RANDOMIZED CONTROLLED TRIAL
Kazutaka Kamiya, Akihito Igarashi, Ken Hayashi, Kazuno Negishi, Masaki Sato, Hiroko Bissen-Miyajima
PURPOSE: To assess the clinical outcomes of currently used refractive surgery procedures performed in 2015. DESIGN: Prospective, multicenter cohort study. METHODS: This prospective study included 15 011 eyes of 7622 consecutive patients who underwent laser in situ keratomileusis (LASIK), surface ablation, refractive lenticule extraction (ReLEx), or phakic intraocular lens (IOL) implantation at 42 major institutions. We determined the safety, efficacy, predictability, stability, and adverse events of these surgeries preoperatively and at 1 week and 1 and 3 months postoperatively...
March 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28007115/comparison-of-stability-between-a-modular-intraocular-lens-system-and-a-single-piece-hydrophobic-acrylic-intraocular-lens
#18
Jeffrey R SooHoo, Stephen S Lane, Robert J Cionni, John P Berdahl, Glenn R Sussman, Malik Y Kahook
PURPOSE: To compare the movement of a modular intraocular lens (IOL) with that of a standard single-piece hydrophobic acrylic IOL in a human cadaver eye perfusion model. SETTING: Department of Ophthalmology, University of Colorado, Aurora, Colorado, USA. DESIGN: Experimental study. METHODS: Eight phakic human donor eyes of 4 patients had standard phacoemulsification with lens removal. One of 2 IOLs was then implanted in the capsular bag: a modular IOL (Harmoni) or a standard single-piece IOL (Acrysof SN60)...
December 2016: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/27843355/retropupilar-positioning-of-foldable-iris-claw-intraocular-lens-for-correction-of-aphakia-with-no-capsular-support
#19
Mun Yueh Faria, Nuno Pinto Ferreira, Ivo Gama, Joana Medeiros Pinto, Mario Canastro, Manuel Monteiro Grillo
SUMMARY: Iris-claw intraocular lens (ICIOL) for aphakia needs a large 5.4 mm corneal incision for its implantation. The technique needs corneal suture, associated with some postoperative astigmatism. Foldable ICIOL is used in phakic patients undergoing refractive surgery and has the advantage of a sutureless small corneal incision. We report a case of a high myopic patient with dislocated intraocular lens (IOL) and no capsular support. Dislocated IOL with its capsular bag was released with three-port, 23-gauge vitrectomy; placed in the anterior chamber; sliced; and extruded through a 3...
2016: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/27598732/material-analysis-of-spontaneously-subluxated-iris-fixated-phakic-intraocular-lenses
#20
Tamer Tandogan, Mike P Holzer, Chul Young Choi, Gerd U Auffarth, Georg Gerten, Ramin Khoramnia
PURPOSE: To conduct a material analysis of spontaneously subluxated iris-fixated phakic intraocular lenses (IOLs) using light and scanning electron microscopy. METHODS: Six explanted Artisan/Verisyse and Artiflex/Veriflex IOLs (Ophtec, Groningen, Netherlands/AMO, Santa Ana, CA) were analyzed in a laboratory using light and scanning electron microscopy. Four of the IOLs had been explanted after spontaneous subluxation leading to a decrease in visual acuity, whereas the remaining two IOLs did not demonstrate signs of disenclavation but had been explanted in the course of planned cataract surgery and thus served as the control in this study...
August 1, 2016: Journal of Refractive Surgery
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