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Toric lens

Waleed Ali Abou Samra, Eman Azmy Awad, Amr Hassan El Kannishy
AIM: To evaluate the visual and topographic outcomes of a two-stage approach treatment for selected cases of progressive keratoconus (KC); corneal collagen cross-linking (CXL) followed by phacoemulsification with toric intraocular lens (IOL) implantation. METHODS: The study included 9 eyes of 6 patients diagnosed with progressive KC, aged from 35 to 47 years (41.6±11.2 years). All studied eyes underwent a two-stage approach treatment: first corneal collagen CXL followed after at least 6 months by phacoemulsification with foldable toric IOL implantation in both eyes of three patients and only one eye of the other three patients...
October 3, 2016: Eye & Contact Lens
Rick Potvin, Brent A Kramer, David R Hardten, John P Berdahl
PURPOSE: To analyze intraocular lens (IOL) orientation data from an online toric back-calculator ( for determining if differences were apparent by lens type. METHODS: A retrospective review of toric back-calculations that included IOL identification and intended orientation axis. RESULTS: Of 12,812 total validated calculation records, 8,229 included intended orientation and lens identification data. Of the latter, 5,674 calculations (69%) involved lenses oriented 5° or more from their intended position...
2016: Clinical Ophthalmology
Sherif A Eissa
PURPOSE: To assess the outcomes of sulcus implantation of the Visian(®) implantable collamer lens (ICL) to correct pseudophakic myopic anisometropic amblyopia with myopic shift and/or primary refractive overcorrection. METHODS: Prospective case series enrolled 14 pseudophakic eyes of 14 patients, 5-9 years old, with history of cataract surgery and primary in the bag-intraocular lenses (IOL) implantation, followed by myopic shift and/or refractive overcorrection and anisometropic amblyopia of variable degrees...
September 29, 2016: Acta Ophthalmologica
Hu-Ping Song, Bing-Yu Tian, Jing Peng
AIM: To evaluate the efficacy of toric intraocular lens markers-assisted implantation of the scleral-fixated intraocular lens (SFIOL). METHODS: From October 2010 to December 2013, all patients who had undergone secondary SFIOL implantation were assigned to group 1 and 2, in group 1 SFIOL was performed with the assist of radial keratotomy (RK)-marker, and in group 2 SFIOL was performed with the assisted of toric intraocular lens markers (T-and axis markers). Patients' demographic data and information on baseline preoperative visual acuity, indication for surgery and latest postoperative visual acuity were collected and analyzed...
2016: International Journal of Ophthalmology
Bin Zhang, Jing-Xue Ma, Dan-Yan Liu, Cong-Rong Guo, Ying-Hua Du, Xiu-Jin Guo, Yue-Xian Cui
AIM: To evaluate the effects of posterior corneal surface measurements on the accuracy of total estimated corneal astigmatism. METHODS: Fifty-seven patients with toric intraocular lens (IOL) implantation and posterior corneal astigmatism exceeding 0.5 diopter were enrolled in this retrospective study. The keratometric astigmatism (KA) and total corneal astigmatism (TA) were measured using a Pentacam rotating Scheimpflug camera to assess the outcomes of AcrySof IOL implantation...
2016: International Journal of Ophthalmology
M Brožková, M Filipec, L Filipová, A Holubová, Z Hlinomazová
AIM: The aim of our study was to evaluate the outcome of cataract surgeries with implantation of intraocular trifocal toric lens, and to study the accuracy of astigmatism correction, lens rotational stability, and safety of the procedures. PATIENTS AND METHODS: Our study comprised 22 eyes of 16 patients who underwent unilateral or bilateral implantation of AT LISA tri toric 939MP, or its implantation in combination with AT LISA tri 839MP. Mean patient age was 58 ± 11 years (39 to 75 years)...
2016: Ceská a Slovenská Oftalmologie
Deborah Jones, Craig Woods, Lyndon Jones, Nathan Efron, Philip Morgan
PURPOSE: To understand long-term contact lens prescribing habits of Canadian optometrists. METHODS: One thousand optometrists were surveyed annually from 2000 to 2015. Information was requested on the first ten patients examined after receiving the survey. RESULTS: Over the 16-year survey period, 1987 optometrists provided information on 19,143 patients. Mean age of the patients was 32.7±14.4years. Ratio of females to males was 2:1, the ratio of new fits to refits was 2:3...
September 16, 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
Toam Katz, Johannes Steinberg, Vasyl Druchkiv, Stephan J Linke, Andreas Frings
The purpose of this study was to analyze ocular residual astigmatism (ORA) before and after implantation of two different optical types of non-toric multifocal intraocular lenses (MIOL) in pre-cataract patients. This retrospective cohort study analyzed 72 eyes from 72 consecutive patients after MIOL surgery . To investigate magnitude and axis of astigmatic changes, the concepts of true corneal astigmatism and Alpins vector method were applied. There were no statistically significant between-group differences prior to surgery...
September 13, 2016: International Ophthalmology
Xiao Zhang, Xiang-Chen Tao, Zhi-Wei Li, Wei-Yan Zhou, Ping Ma, Chun-Xiao Zhang, Yu-Meng Wang, Guo-Ying Mu
The present study reports the use of a phakic toric Implantable Collamer Lens (ICL) that improved the refraction correction of high myopia and astigmatism in a case of keratectasia following corneal cross-linking. A 31-year-old male was diagnosed with keratectasia 12 years after laser-assisted in situ keratomileusis (LASIK). Following LASIK, the manifest refraction was -3.50-2.25×90 [0.1 logarithmic expression (LogMAR) best corrected visual acuity (BVCA)] in the right eye and -8.00-3.50×175 (0.3 LogMAR BCVA) in the left eye, with a LogMAR uncorrected distance visual acuity (UDVA) of 0...
September 2016: Experimental and Therapeutic Medicine
Jeihoon Lee, Hun Lee, David Sung Yong Kang, Jin Young Choi, Eung Kweon Kim, Tae Im Kim
PURPOSE: To compare the effectiveness of toric foldable iris-fixated phakic intraocular lens (pIOL) implantation and non-toric foldable iris-fixated pIOL implantation with limbal relaxing incisions (LRIs) for correcting moderate-to-high astigmatism in myopic eyes. MATERIALS AND METHODS: The medical records of 146 patients (195 eyes) with myopic astigmatism who underwent toric foldable iris-fixated pIOL implantation (toric group; 94 eyes) or non-toric foldable iris-fixated pIOL implantation with concurrent LRIs (LRI group; 101 eyes) were retrospectively reviewed...
November 2016: Yonsei Medical Journal
Jagat Ram, Rishiraj Singh, Rohit Gupta, Garvit Bhutani, Parul Chawla Gupta, Jaspreet Sukhija
PURPOSE: To evaluate the effect of toric intraocular lens (IOL) implantation on the refractive outcomes in children with cataract and preexisting corneal astigmatism. METHODS: We included children between the age group of 8-14 years who were randomized into group I (toric) and group II (non-toric), in which toric and spherical IOLs were implanted, respectively, after phacoaspiration. Primary outcome measure was comparison of preoperative keratometric and postoperative refractive cylinder...
August 30, 2016: Acta Ophthalmologica
John S M Chang, Vincent K C Chan, Jack C M Ng, Antony K P Law
Background. The vision with diffractive toric multifocal intraocular lenses after cataract surgery in long eyes has not been studied previously. Objectives. To report visual performance after bilateral implantation of a diffractive toric multifocal intraocular lens in high myopes. Methods. Prospective, observational case series to include patients with axial length of ≥26 mm and corneal astigmatism of >1 dioptre who underwent bilateral AT LISA 909M implantation. Postoperative examinations included photopic and mesopic distance, intermediate, and near visual acuity; photopic contrast sensitivity; visual symptoms (0-5); satisfaction (1-5); and spectacle independence rate...
2016: Journal of Ophthalmology
Douglas D Koch
PURPOSE: To review the progress and challenges in obtaining accurate corneal power measurements for intraocular lens (IOL) calculations DESIGN: Personal perspective, review of literature, case presentations, and personal data METHODS: Using literature review findings, case presentations, and data from the author's center, the types of corneal measurement errors that can occur in IOL calculation are categorized and described, along with discussion of future options to improve accuracy...
August 22, 2016: American Journal of Ophthalmology
A Liekfeld, D Befurt
PURPOSE: Many different models and types of special intraocular lenses (IOL) are now available for refractive lens surgery. In particular, toric and multifocal IOL need specific conditions to achieve satisfactory results. For multifocal IOL, many models with different optical principles are available. For optimal individual patient-centred care, it is necessary to consider several different options. With special refractive lenses, the principle objective for the patients is to become less dependent on glasses...
August 2016: Klinische Monatsblätter Für Augenheilkunde
Youngsub Eom, Dongok Ryu, Dae Wook Kim, Seul Ki Yang, Jong Suk Song, Sug-Whan Kim, Hyo Myung Kim
BACKGROUND: To evaluate the toric intraocular lens (IOL) calculation considering posterior corneal astigmatism, incision-induced posterior corneal astigmatism, and effective lens position (ELP). METHODS: Two thousand samples of corneal parameters with keratometric astigmatism ≥ 1.0 D were obtained using bootstrap methods. The probability distributions for incision-induced keratometric and posterior corneal astigmatisms, as well as ELP were estimated from the literature review...
October 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
Katharina Linz, Mary S A Attia, Ramin Khoramnia, Tamer Tandogan, Florian T Kretz, Gerd Uwe Auffarth
PURPOSE: To evaluate functional results and reading performance using the Salzburg Reading Desk after implantation of a sector-shaped near-embedded, rotational asymmetrical multifocal intraocular lens (IOL) and a multifocal toric IOL with a +3.00 diopter (D) near addition. METHODS: In a prospective study, the LentisMplus and Mplus toric IOLs (Oculentis GmbH, Berlin, Germany) were implanted in 34 eyes of 18 patients at the University Eye Hospital of Heidelberg. Uncorrected and corrected distance visual acuity (UDVA, CDVA) and uncorrected and corrected near visual acuity (UNVA, CNVA) were evaluated using standardized visual acuity charts (ETDRS)...
August 1, 2016: Journal of Refractive Surgery
Anastasios John Kanellopoulos, George Asimellis
BACKGROUND: Femtosecond-laser assisted clear cornea cataract surgery may hold promise in safer and more effective procedures. We decided to perform a comparative study to standard manual incision phacoemulsification surgery. METHODS: This is a single-center, single-intervention, and prospective comparative data evaluation of 133 consecutive cases subjected to cataract surgery. Group-A (Phaco), manual capsulorhexis & ultrasound phacoemulsification (n = 66); Group-B femtosecond-laser assisted capsulorhexis and lens fragmentation (n = 67), employing the LenSx laser (Alcon Surgical, Ft...
2016: Eye and Vision (London, England)
Hossein Mohammad-Rabei, Elham Mohammad-Rabei, Goldis Espandar, Mohammad Ali Javadi, Mohammad Reza Jafarinasab, Seyed Javad Hashemian, Sepehr Feizi
PURPOSE: To compare the safety and efficacy of three methods for correcting pre-existing astigmatism during phacoemulsification. METHODS: This prospective, comparative, non-randomized study was conducted from March 2010 to January 2011, and included patients with keratometric astigmatism ≥1.25 D undergoing cataract surgery. Astigmatism was corrected using the following approaches: limbal relaxing incisions (LRI) on the steep meridian, extension and suturing of the phaco incision created at the steep meridian (extended-on-axis incision, EOAI), and toric intraocular lens (tIOL) implantation...
April 2016: Journal of Ophthalmic & Vision Research
Alfredo Amigó, Sergio Bonaque-González
PURPOSE: To report findings that could suggest an elliptical shape of the capsular bag. METHODS: Five eyes of three patients with axial length greater than 24 mm underwent phacoemulsification cataract surgery with plate-haptic multifocal toric intraocular lens (IOL) implantation oriented in the vertical meridian. RESULTS: In all cases, correct orientation of the IOLs was verified 30 minutes after surgery. After 24 hours, all eyes demonstrated unwanted rotation of the IOLs ranging from 15 to 45 degrees...
April 2016: Journal of Ophthalmic & Vision Research
Somayeh Radaie-Moghadam, Hassan Hashemi, Ebrahim Jafarzadehpur, Abbas Ali Yekta, Mehdi Khabazkhoob
PURPOSE: To determine the effect of using toric soft contact lenses on corneal biomechanical properties. METHODS: We enrolled 33 healthy patients with mean age of 23.18 ± 4.06 and minimal cylinder power of 1 D (-1.98 ± 0.808 SD) and negative history of contact lens use; keratoconic patients were excluded from the study. Toric soft contact lenses (BIOFINITY, Comfilcon A, Coopervision, Southampton, UK) were fitted in all participants. The Ocular Response Analyzer (Reichert Ophthalmic Instruments, Depew, New York, USA) was used to measure corneal hysteresis (CH), corneal resistance factor (CRF), and the Pentacam HR (Oculus, Inc...
April 2016: Journal of Ophthalmic & Vision Research
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