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IOL power calculation cataract keratoplasty

Reena Gupta, Ruta Kinderyte, Deborah S Jacobs, Ula V Jurkunas
PURPOSE: To report a case of coexistent Fuchs endothelial corneal dystrophy (FECD) and keratoconus (KCN) in which there was normalization of corneal topography after Descemet membrane endothelial keratoplasty (DMEK). METHODS: Retrospective medical record review. RESULTS: Preoperative findings revealed a best-corrected visual acuity of 20/40 with -1.00 - 2.50 × 147, topographic maximum keratometry of 50.8 D with inferior steeping, and confluent guttae in the left eye...
October 2017: Cornea
Hideaki Yokogawa, P James Sanchez, Zachary M Mayko, Michael D Straiko, Mark A Terry
PURPOSE: To report the clinical efficacy of astigmatism correction with toric intraocular lenses (IOLs) in patients undergoing the Descemet membrane endothelial keratoplasty (DMEK) triple procedure and to evaluate the accuracy of the correction. METHODS: Fifteen eyes of 10 patients who received cataract extraction, toric IOL placement, and DMEK surgery for Fuchs corneal dystrophy and cataracts were evaluated. The cylinder power of toric IOLs was determined by an online toric calculator with keratoscopy measurements obtained using Scheimpflug corneal imaging...
March 2017: Cornea
Evan D Schoenberg, Francis W Price, Jalee Miller, Yuri McKee, Marianne O Price
PURPOSE: To describe the refractive outcomes of triple Descemet membrane endothelial keratoplasty (DMEK). DESIGN: Retrospective case series. METHODS: The study included patients with Fuchs endothelial dystrophy and cataract without coincident pathology. RESULTS: Outcomes of 108 sequential triple DMEK procedures were evaluated. With a mean follow-up of 11.9 months, the median corrected distance visual acuity (CDVA) was 20/20 (range 20/15 to 20/40) and the median uncorrected distance visual acuity in eyes with a distance target (n = 84) was 20/40 (range 20/20 to 20/200)...
June 2015: Journal of Cataract and Refractive Surgery
Achim Langenbucher, Nóra Szentmáry, Corinna Spira, Berthold Seitz, Timo Eppig
BACKGROUND AND PURPOSE: Descemet stripping automated endothelial keratoplasty (DSAEK) is an established treatment option for pathologies of the corneal endothelium. It is typically accompanied with a hyperopic shift in refraction. The purpose of this work is to predict corneal geometry after DSAEK based on model data and to present a concept how to determine corneal power, e.g. for intraocular power calculation to prevent a refractive surprise with a subsequent cataract surgery. MATERIAL AND METHODS: Based on data of the Kooijman schematic model eye we simulated a microkeratome cut parallel to the corneal front surface for donor trephination to determine the radial thickness profile of the posterior corneal donor lamella...
June 2016: Zeitschrift Für Medizinische Physik
Ugo de Sanctis, Francesco Damiani, Luca Brusasco, Federico Grignolo
PURPOSE: To assess refractive error after cataract surgery combined with Descemet stripping automated endothelial keratoplasty using adjusted keratometric (K) readings to calculate intraocular lens (IOL) power. DESIGN: Prospective, interventional case series. METHODS: One eye of 39 consecutive patients with Fuchs endothelial dystrophy and cataract were included. To calculate IOL power before surgery, the Javal steep and flat K readings (Haag-Streeit) were adjusted by reducing their value by -1...
August 2013: American Journal of Ophthalmology
Pan-Pan Ye, Wen Xu, He-Sheng Xu, Zhao-Chun Li, Jun-Ting Shi, Feng-Ying He, Ke Yao
Although there are many formulae for the calculation of intraocular lens power in the eyes with previous kerato-refractive surgeries, unexpected refractive bias still exists. Hyperopic bias is particularly disliked because it affects both uncorrected distance and near visual acuity. Surgical treatment of the residual hyperopia for the eyes with both laser in situ keratomileusis and cataract surgery remains to be a big problem. Conductive keratoplasty has been shown to be an effective, safe and predictable method for low and moderate hyperopia in the pseudophakic eyes or in the eyes with kerato-refractive surgeries...
2012: International Journal of Ophthalmology
Gustavo Bonfadini, John G Ladas, Hamilton Moreira, Mauro Campos, Mario Matthaei, Beatriz Muñoz, Kim Pratzer, Albert S Jun
PURPOSE: To evaluate the accuracy of intraocular lens (IOL) power calculations with A-constant optimization in Descemet's stripping automated endothelial keratoplasty (DSAEK) combined with cataract extraction and intraocular lens implantation (DSAEK triple procedure). DESIGN: Retrospective case series. PARTICIPANTS: Thirty eyes of 22 patients with Fuchs' endothelial dystrophy who underwent the DSAEK triple procedure performed by a single surgeon...
February 2013: Ophthalmology
Sepehr Feizi, Mohammad A Javadi
PURPOSE: To evaluate change in graft steepness after graft refractive surgery (GRS) consisting of relaxing incisions with or without counterquadrant compression sutures and discover the existing influential factors. METHODS: In this retrospective study, 78 eyes of 76 patients who had received penetrating keratoplasty for keratoconus underwent GRS because of high post-penetrating keratoplasty astigmatism. Any shift in graft curvature was calculated using the keratometric coupling ratio (CR; the ratio of flattening of the incised meridian to steepening of the opposite meridian)...
September 2012: Cornea
Ljubisa Nikolić, Vesna Jovanović
INTRODUCTION: Simultaneous Descemet stripping endothelial keratoplasty, phacoemulsification, and intraocular lens implantation are indicated in Fuchs' dystrophy with associated cataract. Compared to the standard method of the triple procedure which includes penetrating keratoplasty, this new method has the advantages of sutureless surgery, small limbal incision, faster recovery, less surface problems, less astigmatism, stronger tensile strength and more predictable calculation of the intraocular lens power...
September 2011: Vojnosanitetski Pregled. Military-medical and Pharmaceutical Review
Lisanne Ham, Isabel Dapena, Kyros Moutsouris, Chandra Balachandran, Laurence E Frank, Korine van Dijk, Gerrit R J Melles
PURPOSE: To determine the refractive change and stability of the transplanted cornea after Descemet membrane endothelial keratoplasty (DMEK) through a 3.0 mm clear corneal incision. SETTING: Tertiary referral center. DESIGN: Cohort study. METHODS: Subjective and objective refractive data from pseudophakic eyes were obtained before and 3 and 6 months after DMEK. RESULTS: The study comprised 50 eyes, 7 were phakic and 43 pseudophakic...
August 2011: Journal of Cataract and Refractive Surgery
T Eppig, A Viestenz, B Seitz, A Langenbucher
BACKGROUND: A high corneal astigmatism limits the attainable visual acuity and the ability of correction with spectacles or contact lenses. The astigmatism can also be an impairment for visual rehabilitation, especially after penetrating keratoplasty. A pseudohakic toric intraocular lens (T-IOL) can correct high corneal astigmatism during cataract surgery. For the calculation of the correct power for the T-IOL several additional factors need to be considered, which are less relevant for spherical IOL calculation...
August 2011: Klinische Monatsblätter Für Augenheilkunde
T Dietrich, A Viestenz, A Langenbucher, G O H Naumann, B Seitz
BACKGROUND: In concomitant cataract surgery and penetrating keratoplasty (PKP), the sequential procedure is supposed to have a higher accuracy in calculation of the intraocular lens (IOL) power compared to the triple procedure. The purpose of this study was to evaluate the refractive results of cataract surgery in patients after PKP. MATERIALS AND METHODS: Our retrospective study included 72 operations on 65 patients. In 35 eyes (group 1, G 1), all corneal sutures had been removed before cataract surgery (median time interval after PKP 3...
August 2011: Klinische Monatsblätter Für Augenheilkunde
M Wolter-Roessler, M Küchle
BACKGROUND: We report the results of the secondary implantation of retroiridally fixated irisclaw-lenses (Artisan(R)) to correct aphakia. PATIENTS AND METHODS: This retrospective study included all eyes that had undergone outpatient implantation of an Artisan IOL by the senior author (MK) between July 2004 and January 2008. We analysed 48 eyes of 46 patients (27 female, 19 male) aged 17 to 87 years. Underlying conditions were: aphakia after congenital cataract or trauma (19 eyes), late luxation of a posterior chamber IOL (16 eyes), intraoperative zonulolysis during cataract surgery that did not allow PC IOL implantation (12 eyes, including 10 eyes with pseudoexfoliation and one eye with Marfan syndrome), anterior chamber IOL with corneal decompensation problems and recurrent hyphema (1 eye)...
December 2008: Klinische Monatsblätter Für Augenheilkunde
Szu-Hui Lee, Ching-Yao Tsai, Shiow-Wen Liou, Ray Jui-Fang Tsai, Jau-Der Ho
PURPOSE: To report intraocular lens (IOL) power calculation in 2 eyes that were highly undercorrected by previous myopic automated lamellar keratoplasty (ALK). METHODS: A 35-year-old man underwent bilateral myopic ALK, which caused high residual myopia (-9.0 -4.0 x 171 and -9.5 -4.5 x 74). The patient then underwent cataract surgery with IOL implantation for cataract development. The double-K clinical history method was utilized, and satisfactory IOL power prediction results were obtained...
October 2008: Cornea
Srinivas K Rao, Chris K S Leung, Carol Y L Cheung, Emmy Y M Li, Arthur C K Cheng, Philip T H Lam, Dennis S C Lam
PURPOSE: To determine the changes in corneal optical performance after posterior lamellar corneal transplantation. DESIGN: Retrospective case series. METHODS: The anterior segment in four eyes of four patients who underwent Descemet stripping endothelial keratoplasty (DSEK) with cataract extraction and intraocular lens (IOL) implantation were imaged with the Visante anterior segment optical coherence tomography [OCT] (Carl Zeiss Meditec, Dublin, California, USA)...
June 2008: American Journal of Ophthalmology
Douglas J Covert, Steven B Koenig
PURPOSE: To evaluate visual acuity (VA), graft clarity, and refractive outcome of Descemet's stripping and automated endothelial keratoplasty (DSAEK) combined with phacoemulsification and intraocular lens (IOL) implantation in patients with coexisting Fuchs' endothelial dystrophy and immature senile cataracts. DESIGN: Pilot, prospective, noncomparative, surgical case series. PARTICIPANTS: Twenty-one eyes of 21 consecutive patients with coexisting visually significant immature senile cataracts and Fuchs' corneal dystrophy with guttata of Descemet's membrane and either microcystic epithelial edema or stromal edema presenting to a single academic eye institute...
July 2007: Ophthalmology
I Vicha, E Vlková, Z Hlinomazová, V Loukotová, M Horácková, J Nĕmec, M Goutaib
PURPOSE: To evaluate the successfulness of intraocular lens (IOL) power calculation and refractive error after the triple procedure. METHODS: During the period 1995-2004, the triple procedure was performed in 51 eyes of 43 patients aged 29-83 years (mean 66 years) with corneal disease and cataract. For the IOL power calculation, the SRK II formula was used. In case of impossibility to measure the keratometry, the data from the other eye, or the value 7.7 mm were used...
January 2007: Ceská a Slovenská Oftalmologie
Claudia Gruenauer-Kloevekorn, Kristian Kloevekorn-Norgall, Gernot I W Duncker, Anke Habermann
PURPOSE: The purpose of this investigation was to determine whether or not the use of a standard constant keratometry value in cases of preoperative abnormal keratometry values in biometry for triple procedures is advisable. METHODS: Cataract surgery and penetrating keratoplasty were performed in 82 eyes; 53 eyes underwent triple procedures and 29 eyes underwent non-simultaneous procedures. A standard constant keratometry value of 42.50 D was applied in 18 triple-procedure eyes because the preoperative measured keratometry values were outwith the normal range (41-47 D)...
October 2006: Acta Ophthalmologica Scandinavica
Sean D Adrean, Charles Reilly, Mark J Mannis
PURPOSE: To report a case of a patient who underwent cataract extraction with intraocular lens (IOL) implantation after previous penetrating keratoplasty (PK) followed by laser in situ keratomileusis (LASIK). METHODS: Case report and literature review of cataract surgery after PK and LASIK. Cataract surgery was successfully performed in a patient with previous PK and LASIK. This paper outlines our method of calculating the correct power IOL for implant. RESULTS: The patient's 1-month postoperative uncorrected visual acuity was 20/70 and best spectacle-corrected visual acuity was 20/30+ with -0...
July 2005: Cornea
Anja Viestenz, Berthold Seitz, Achim Langenbucher
PURPOSE: To develop a correcting term for intraocular power (IOLP) prediction for penetrating keratoplasty combined with simultaneous extracapsular cataract extraction and posterior chamber lens implantation (triple procedure). METHODS: As part of a prospective clinical study, triple procedures were performed in 42 eyes with Fuchs' dystrophy. Only eyes with readable preoperative K-values were included in this study. Differences (DEV) between achieved and target refraction (TR) depending on the values of the theoretical-optical formula according to HAIGIS were investigated using multiple regression analysis in a linear anova model: DEV = a + b CP + c AL + d IOLP + e TR...
June 2005: Acta Ophthalmologica Scandinavica
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