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Phakic IOL

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
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
M-M Gellrich, C Kandzia
Reflexes that accompany every examination with the slit lamp are usually regarded as annoying and therefore do not receive much attention. In the video available online, clinical information "hidden" in the Purkinje images is analyzed according to our concept of slit lamp videography. In the first part of the video, the four Purkinje images which are reflections on the eye's optical surfaces are introduced for the phakic eye. In the pseudophakic eye, however, the refracting surfaces of the intraocular lens (IOL) have excellent optical properties and therefore form Purkinje images 3 and 4 of high quality...
September 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
Wei Fang, Jiuke Li, Xiaohong Jin, Jing Zhai, Yuanmin Dai, Yumin Li
BACKGROUND: Refraction change of silicone oil (SO) tamponade in phakic and aphakic eye has been studied thoroughly; however, it is rarely studied in pseudophakic eye. In this paper we aimed to deduce a theoretical formula predicting refractive shift of silicone oil tamponade in pseudophakic eye and compared it with clinical findings. METHOD: A theoretical formula was deduced through strict geometric optical principles under the Helmholtz Schematic eye model. Pre/postoperative refractive status of patients who previously underwent phacoemulsification, intraocular lens (IOL) implant, vitrectomy, SO tamponade and required SO extraction was studied...
2016: BMC Ophthalmology
Yanin Suwan, Bayasgalan Purevdorj, Chaiwat Teekhasaenee, Wasu Supakontanasan, Pornchai Simaroj
BACKGROUND: Report of three patients with pseudophakic angle-closure from a Soemmering ring. Three mechanisms of the Soemmering ring induced pseudophakic angle-closure in three patients were demonstrated by meticulous anterior segment examination and ultrasound biomicroscopic (UBM) analysis. CASE PRESENTATION: In the first case, the Soemmering-capsule-IOL complex caused relative pupillary block similar to a phakic eye and was successfully treated with laser iridotomy alone...
2016: BMC Ophthalmology
T Kohnen, M Shajari
Refractive surgical procedures are generally divided into additive procedures with, e. g. implantation of an artificial lens and subtractive procedures with ablation of corneal tissue. In this article the current status of phakic intraocular lens (IOL) implantation for correction of refractive errors is reviewed. Phakic IOLs are constructed as angle-supported or iris-fixated anterior chamber lenses and sulcus-fixated posterior chamber lenses. The implantation of phakic IOLs has been demonstrated to be an effective, safe, predictable and stable procedure to correct higher refractive errors...
June 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
Masashi Nakajima, Takahiro Hiraoka, Toshiya Yamamoto, Seiu Takagi, Yoko Hirohara, Tetsuro Oshika, Toshifumi Mihashi
Several researchers have studied the longitudinal chromatic aberration (LCA) of eyes implanted with an intraocular lens (IOL). We investigated the LCA of eyes implanted with yellow-colored IOLs from three different manufacturers: Alcon Inc., HOYA Corp., and AMO Inc. The number of subjects was 11, 16, and 16, respectively. The LCA of eyes implanted with SN60WF and SN60AT (Alcon Inc.), and with XY-1 (HOYA Corp.), was the same as that of phakic eyes. The LCA of eyes with ZCB00V (AMO Inc.) was smaller than that of phakic eyes...
2016: PloS One
Nilufer Yesilirmak, Zachary Davis, Sonia H Yoo
No abstract text is available yet for this article.
2016: International Ophthalmology Clinics
Xin Liu, Fan Fan, Xiaoying Wang, Yi Lu, Tianyu Zheng, Peng Zhou, Xingtao Zhou, Yi Luo
Purpose. To analyze the safety, effectiveness, and stability of triplex surgery for phakic 6H anterior chamber phakic intraocular lens explantation and phacoemulsification with in-the-bag IOL implantation for super high myopia in long-term observations. Methods. This retrospective case series evaluated 16 eyes of 10 patients who underwent triplex surgery. Best corrected visual acuity (BCVA), endothelial cell density (ECD), and associated adverse events were evaluated. Results. The mean follow-up time after the triplex surgery was 46 ± 14 months...
2016: Journal of Ophthalmology
Hui Chen, Haotian Lin, Zhuoling Lin, Jingjing Chen, Weirong Chen
BACKGROUND: Ocular biometry is important for preoperative assessment in cataract and anterior segment surgery. The purpose of this study was to investigate normative ocular biometric parameters and their associations in an older Chinese population. METHODS: This was a cross-sectional observational study. From 2013 to 2014, we recruited inhabitants aged 50 years or older in Guangzhou, China. Among 1,117 participants in the study, data from 1,015 phakic right eyes were used for analyses...
2016: BMC Ophthalmology
Vincent M Borderie, Patrick Loriaut, Nacim Bouheraoua, Jean-Philippe Nordmann
PURPOSE: To analyze the cumulated incidence of glaucoma after penetrating keratoplasty (PK), anterior lamellar keratoplasty (ALK), and endothelial keratoplasty (EK). DESIGN: Cohort study. Data were recorded prospectively and analyzed retrospectively. PARTICIPANTS: A total of 1657 consecutive eyes of 1657 patients undergoing corneal transplantation between 1992 and 2013. METHODS: Penetrating keratoplasty (date range, 1992-2013), ALK (date range, 2002-2013), and Descemet's stripping automated EK (date range, 2006-2013)...
July 2016: Ophthalmology
Fady K Sammouh, Tania A Baban, Haytham M El Ballouz, Elias L Warrak
OBJECTIVE: Case series of haptic migration in patients with angle-supported phakic anterior chamber intraocular lens (PAC-IOL: Phakic6H) through the superior peripheral iridectomy (PI). METHODS: Charts of 23 patients (35 eyes) with at least 6 months' postoperative follow-up were retrospectively reviewed. Evaluation included preoperative and postoperative cycloplegic and manifest refractions, uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), slit-lamp examination, fundoscopy, corneal topography, and biometry...
April 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Marco Messina, Mohamed Elalfy, Usama Fares, Noha Ghoz, Balraj Mavi, Harminder Dua
The purpose of this study was to report on the occurrence and management of posterior synechiae (PS) in three hyperopic eyes after iris-fixated anterior chamber phakic IOL implantation. This is a case report of a 55-year-old man and a 55-year-old lady who had undergone iris-fixated anterior chamber phakic IOL implantation to correct hyperopic astigmatism (one eye) and hyperopia (both eyes), respectively. The three eyes developed creeping PS and pigment dispersion within 4-6 weeks of surgery. Synechiolysis and pupil stretching in one eye did not work as the synechiae promptly recurred...
February 24, 2016: International Ophthalmology
Abdulelah A Al-Abdullah, Mohammad A Al-Falah, Saba A Al-Rasheed, Rajiv Khandekar, Enrique Suarez, J Fernando Arevalo
PURPOSE: To compare the incidence and characteristics of retinal complications following implantation of two types of phakic intraocular lenses (PIOLs) in patients with myopia. METHODS: In this comparative, retrospective study, 603 eyes of 344 patients with myopia underwent implantation of either an Artisan iris-fixated phakic intraocular lens IOL (Artisan; Ophtec, Groningen, Netherlands) (Artisan group) or a Visian implantable collamer lens (ICL; STAAR Surgical Company, Monrovia, CA) (ICL group) between June 2005 and December 2013...
December 2015: Journal of Refractive Surgery
Raffaele Mancino, Francesco Aiello, Elena Ciuffoletti, Emiliano Di Carlo, Angelica Cerulli, Carlo Nucci
BACKGROUND: One of the most challenging problems in vitro-retinal surgery is the recurrence of retinal detachment in the context of high-grade proliferative vitreoretinopathy (PVR). The aim of our retrospective study was to assess the surgical outcomes of pars plana vitrectomy, 180° inferior retinotomy and silicone oil tamponade combined with phacoemulsification and IOL implantation for recurrent inferior retinal detachment with grade C PVR in phakic eyes. The study was carried out at tertiary referral centre - University Hospital of Rome "Tor Vergata"...
2015: BMC Ophthalmology
Mats Lundström, Sonia Manning, Peter Barry, Ulf Stenevi, Ype Henry, Paul Rosen
BACKGROUND: A European web-based registry for refractive surgery was established in 2008; The European Registry of Quality Outcomes for Cataract and Refractive Surgery (EUREQUO). The aim of the registry was to improve treatment and standards of care for refractive surgery. Further aims were to offer a tool for benchmarking by establishing a reference database and for surgeons to enter and analyze their own outcomes. The purpose of this study was to characterize the registry and analyze the data collected during its first decade...
2015: Eye and Vision (London, England)
Michael J Simpson
At very large visual angles, vignetting can occur at the edge of an intraocular lens (IOL), because it is much smaller than the natural crystalline lens that it replaces. Ray trace calculations show that, by 80-90 deg of input visual angle, it is possible that about half the light is no longer focused by the IOL. This may create curved, peripheral, shadowlike regions, which are a clinical characteristic of negative dysphotopsia. The imaging characteristics for this "far peripheral vision" region are different from those of a phakic eye, whether or not negative dysphotopsia is experienced...
September 1, 2015: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
Ebrahim Jafarzadehpur, Hassan Hashemi, Tahereh Abdolahinia, Abbas A Yekta, Mehdi Khabazkhoob
OBJECTIVE: To compare differences in higher-order aberrations (HOAs) between two standard spherical monofocal intraocular lenses (IOLs), the hydrophobic acrylic Alcon SA60AT (Bausch & Lomb), and hydrophilic acrylic Rayner Superflex (620H) (Rayner). METHODS: In this case series, sixty-eight eyes of 68 patients who underwent phacoemulsification cataract surgery were studied. In group 1 (n=39), the hydrophobic Alcon SA60AT IOL, and in group 2 (n=29), the hydrophilic Rayner Superflex (620H) IOL, were implanted...
September 2015: Eye & Contact Lens
Florian T A Kretz, Tamer Tandogan, Ramin Khoramnia, Gerd U Auffarth
AIM: To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting, monofocal intraocular lens (IOL). METHODS: Twenty-one patients (34 eyes) aged 50 to 83y underwent cataract surgery with implantation of an aspheric, aberration correcting IOL (Tecnis ZCB00, Abbott Medical Optics). Three months after surgery they were examined for uncorrected (UDVA) and corrected distance visual acuity (CDVA), contrast sensitivity (CS) under photopic and mesopic conditions with and without glare source, ocular high order aberrations (HOA, Zywave II) and retinal straylight (C-Quant)...
2015: International Journal of Ophthalmology
Ayong Yu, Qinmei Wang, Shuangqian Zhu, Anquan Xue, Yanfeng Su, Rui Pan
OBJECTIVE: To study the effects of posterior chamber phakic intraocular lens (IOL) on axial length (AL) measurements and whether a correction factor for later IOL power calculation before cataract surgery is necessary. METHODS: Twenty-two high myopic patients (39 eyes) with mean spherical equivalent -19.00 +/- 4.03 D received phakic refractive lens (PRL) implantation, and 24 patients (40 eyes) with mean spherical equivalent (-13.10 +/- 2.53) D received implantable Collamer lens (ICL) implantation...
March 2015: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
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