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Refractive surgery

C Kern, K Kortüm, M Müller, A Kampik, S Priglinger, W J Mayer
Purpose: To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome. Methods: Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values. Prediction error, median absolute error, and refractive astigmatism error were evaluated for the standard calculator...
2018: Journal of Ophthalmology
Bryan S Lee, David F Chang
PURPOSE: To compare the rotational stability of the 2 most commonly used toric intraocular lenses (TIOLs). DESIGN: Retrospective cohort study in a single private practice. SUBJECTS: The study included all patients receiving an Acrysof (n = 626) or Tecnis TIOL (n = 647) over an 18-month period from April 2015 to September 2016. Patients were only excluded if their surgery could not be performed using a digital marking system. METHODS: All patients had cataract surgery performed in the same surgical center with a similar technique...
March 12, 2018: Ophthalmology
E N Eskina, K K Davtyan
Presently ReLEx Smile as a method of vision correction in refractive surgery is becoming increasingly popular in Russia and abroad. PURPOSE: to develop an algorithm for planning the surgery and choosing its parameters, and to assess the efficacy, safety and predictability of the results in the 6-month follow-up period. MATERIAL AND METHODS: The study involved 80 patients (159 eyes) with myopia of various degrees with a mean age of 33±6 years (25 to 44 years old)...
2018: Vestnik Oftalmologii
Taraprasad Das
PURPOSE: The International Agency for Prevention of Blindness (IAPB) South East Asia region (SEAR) that consists of 11 countries contains 26% of the world's population (1,761,000,000). In this region 12 million are blind and 78.5 million are visually impaired. This amounts to 30% of global blindness and 32% of global visual impairment. DESIGN: Rapid assessment of avoidable blindness (RAAB) survey analysis. METHODS: RAAB, either a repeat or a first time survey, was completed in 8 countries in this decade (2010 onwards)...
March 13, 2018: Asia-Pacific Journal of Ophthalmology
Olga Reitblat, Adi Levy, Guy Kleinmann, Ehud I Assia
PURPOSE: To compare ocular measurements of three optical biometry devices and their application in intraocular lens (IOL) power calculations. METHODS: One hundred and forty eyes which had undergone cataract extraction surgery with preoperative biometry with OA--2000, IOLMaster-500, and Lenstar-LS900 were enrolled. Biometry measurements of the three devices were compared. The deviation of the postoperative refraction from the preoperative refractive target was calculated with different formulas (Barrett Universal II, Hoffer Q, Holladay I, and SRK/T)...
March 12, 2018: Eye
Sudhi P Kurup, Heath W Barto, Gihyun Myung, Marilyn B Mets
BACKGROUND: Previous studies of partially accommodative esotropia (PAET) have assessed factors requiring surgery and alignment outcomes. The purpose of the present study was to additionally evaluate stereoacuity in patients who required surgery for their nonaccommodative component. METHODS: The medical records of consecutive patients with PAET who underwent bilateral medial rectus recession from April 1990 to July 2010to treat the nonaccommodative component were reviewed retrospectively...
March 8, 2018: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Tiago B Ferreira, João Pinheiro, Leyre Zabala, Filomena J Ribeiro
PURPOSE: To compare the clinical outcomes after cataract surgery with implantation of a monofocal or an extended-range-of-vision intraocular lens (IOL). SETTING: Hospital da Luz, Lisbon Portugal. DESIGN: Prospective case series. METHODS: Patients who previously had myopic laser in situ keratomileusis (LASIK) had cataract surgery with bilateral implantation of an extended-range-of-vision IOL (Tecnis Symfony) or a monofocal IOL (Tecnis ZCB00)...
March 8, 2018: Journal of Cataract and Refractive Surgery
Thomas A Berk, Matthew B Schlenker, Xavier Campos-Möller, Austin M Pereira, Iqbal Ike K Ahmed
PURPOSE: Femtosecond laser-assisted cataract surgery (FLACS) has emerged as an alternative to manual cataract surgery (MCS) for corneal incision and capsulorhexis creation, as well as nuclear fragmentation. This study compares postoperative refractive and visual outcomes in eyes receiving MCS or FLACS. DESIGN: Single-center, comparative, retrospective cohort analysis. PARTICIPANTS: Consecutive eyes receiving FLACS and MCS from July 1, 2012, to July 31, 2015, at a single tertiary care center...
March 6, 2018: Ophthalmology
Yu Meng Wang, Tsz Kin Ng, Kwong Wai Choy, Hoi Kin Wong, Wai Kit Chu, Chi Pui Pang, Vishal Jhanji
PURPOSE: To illustrate the histopathology of keratoconic corneal epithelia and its micro-ribonucleic acid (miRNA) regulation. METHODS: Corneal epithelia were collected from 27 patients with keratoconus and 26 normal patients after surgery or by impression cytology. The miRNA profile was determined using miRNA microarray. The biological roles of miRNA target genes were delineated by gene ontology and pathway analyses. The expressions of significant miRNAs were validated using TaqMan polymerase chain reaction (PCR), whereas protein localization and expression of the miRNA target genes were examined by immunofluorescence and immunoblotting analyses...
March 1, 2018: Journal of Refractive Surgery
Tiago Monteiro, José F Alfonso, Nuno Franqueira, Fernando Faria-Correia, Renato Ambrósio, David Madrid-Costa
PURPOSE: To compare the predictability of intrastromal tunnel depth creation for intrastromal corneal ring segments (ICRS) implantation between manual dissection and femtosecond laser using a high-resolution anterior segment optical coherence tomography (AS-OCT). METHODS: This multicenter study included patients with keratoconus who had Ferrara-type ICRS implantation at Hospital de Braga using manual dissection and at the Fernandez-Vega Ophthalmological Institute using the femtosecond laser technique...
March 1, 2018: Journal of Refractive Surgery
Mohamed Shafik Shaheen, Mohamed M Lolah, David P Piñero
PURPOSE: To evaluate the clinical results of epitheliumoff corneal cross-linking (CXL) during a 7-year follow-up. METHODS: This retrospective, non-randomized, single-center interventional study enrolled 34 consecutive eyes of 24 patients with progressive keratoconus undergoing CXL surgery with epithelium removal. Visual, refractive, corneal topographic, pachymetric, and anterior segment changes were evaluated at 1, 3, and 7 years after surgery. RESULTS: Significant reduction of refraction was observed at 1 year postoperatively (P ≤ ...
March 1, 2018: Journal of Refractive Surgery
Ikhyun Jun, David Sung Yong Kang, Dan Z Reinstein, Samuel Arba-Mosquera, Timothy J Archer, Kyoung Yul Seo, Tae-Im Kim
PURPOSE: To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) for the correction of high astigmatism. METHODS: This retrospective, comparative case series study included 89 eyes (89 patients) that received treatment for myopia with high astigmatism (≥ 2.50 diopters) using SMILE with a triple centration technique (SMILE group; 45 eyes) and corneal wavefront-guided transepithelial PRK (transepithelial PRK group; 44 eyes)...
March 1, 2018: Journal of Refractive Surgery
Dan-Mircea Stănilă, Andreea-Maria Florea, Adriana Stănilă, Alina Adriana Panga
Introduction: The phacoemulsification cataract surgery is the most frequently performed surgery and it generally improves vision in over 90% of the patients. Hyperopic patients are a challenge during phacoemulsification especially because of their short eyeball and shallow anterior chamber. A shallow anterior chamber is associated with overall reduction of the safe zone, which may lead to difficulty in creating the corneal incisions, harder capsulorhexis performing, or endothelial complications...
October 2017: Romanian Journal of Ophthalmology
Calin Petru Tataru
No abstract text is available yet for this article.
October 2017: Romanian Journal of Ophthalmology
Eugenia Iglesias, Ravin Sajnani, Roy C Levitt, Constantine D Sarantopoulos, Anat Galor
PURPOSE: To evaluate the frequency and risk factors for persistent postsurgical pain (PPP) after cataract surgery, defined as mild or greater dry eye (DE)-like symptoms 6 months after surgery. METHODS: This single-center study included 86 individuals who underwent cataract surgery between June and October 2016 and had DE symptom information available 6 months after surgery. Patients were divided into 2 groups: controls were defined as those without DE symptoms 6 months after surgery (defined by a Dry Eye Questionnaire 5 (DEQ5) score <6), cases were defined as those with mild or greater DE-like symptoms 6 months after surgery (DEQ5 ≥6)...
December 7, 2017: Cornea
Anne-Marie Yardley, Asim Ali, Nasrin Najm-Tehrani, Kamiar Mireskandari
PURPOSE: To describe refractive and visual outcomes of pediatric traumatic cataract requiring surgery and evaluate the factors influencing success. SETTING: Hospital for Sick Children, Toronto, Ontario, Canada. DESIGN: Retrospective case series. METHODS: Charts of children having lensectomy for traumatic cataract between January 1, 2000, and June 30, 2015, were reviewed for demographic information, visual and refractive outcomes, complications, and surgical details...
January 2018: Journal of Cataract and Refractive Surgery
Giuseppe Giannaccare, Laura Primavera, Michela Fresina
PURPOSE: To evaluate refractive, binocular vision and ocular alignment outcomes of photorefractive keratectomy (PRK) for the treatment of hyperopia in esotropic patients. METHODS: Medical charts of hyperopic patients with full or partial accommodative esotropia (FAE or PAE) or consecutive exotropia (CE) undergone PRK from 2011 to 2014 were reviewed. The primary outcome was to assess the efficacy of PRK in improving ocular alignment. The secondary outcomes were the assessments of uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), spherical equivalent (SE) and stereoacuity...
March 3, 2018: International Ophthalmology
Tsukasa Satou, Sayaka Kato, Akihito Igarashi, Misae Ito, Shuntaro Tsunehiro, Manabu Koshimizu, Takahiro Niida, Kimiya Shimizu
PURPOSE: Pupillometry should be performed under conditions as close to natural viewing as possible. The present study aimed to determine whether pupil size in binocular open-view settings can be predicted based on pupil size measured using the CASIA2 device. METHODS: The present study included 61 participants (25 men and 36 women; mean age, 49 ± 15 years; age range, 22-69 years) with no history of ophthalmic disease other than refractive errors and cataract...
March 2, 2018: International Ophthalmology
AnnMarie Hipsley, Brad Hall, Karolinne M Rocha
Presbyopia corrections traditionally have been approached with attempts to exchange power, either at the cornea or the lens planes, inducing multifocality, or altering asphericity to impact the optical system. Treatments that affect the visual axis, such as spectacle and contact lens correction, refractive surgeries, corneal onlays and inlays, and intraocular lenses are typically unable to restore true accommodation to the presbyopic eye. Their aim is instead to enhance 'pseudoaccommodation' by facilitating an extended depth-of-focus for which vision is sufficient...
2018: Eye and Vision (London, England)
Mohammad Ghoreishi, Mehdi Abdi-Shahshahani, Alireza Peyman, Mohsen Pourazizi
PURPOSE: The aim of this study was to determine the correlation between ocular biometric parameters and sulcus-to-sulcus (STS) diameter. METHODS: This was a cross-sectional study of preoperative ocular biometry data of patients who were candidates for phakic intraocular lens (IOL) surgery. Subjects underwent ocular biometry analysis, including refraction error evaluation using an autorefractor and Orbscan topography for white-to-white (WTW) corneal diameter and measurement...
February 21, 2018: International Ophthalmology
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