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Refractive surgery

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https://www.readbyqxmd.com/read/28628503/influence-of-refractive-status-on-the-higher-order-aberration-pattern-after-small-incision-lenticule-extraction-surgery
#1
Liuyang Li, George P M Cheng, Alex L K Ng, Tommy C Y Chan, Vishal Jhanji, Yan Wang
PURPOSE: To study the effect of myopia on the pattern change in higher-order aberrations after small incision lenticule extraction. METHODS: Sixty eyes of 60 patients were included: low myopia (≤-3.00 D), moderate myopia (-3.00 D to -6.00 D), and high myopia (≥-6.00 D). Total higher-order aberrations (tHOA), vertical coma (C3), horizontal coma (C3), and spherical aberration (C4) were measured preoperatively and at postoperative 3 months. RESULTS: At the end of 3 months, tHOA changed significantly compared with the preoperative values (P < 0...
June 14, 2017: Cornea
https://www.readbyqxmd.com/read/28628489/shifting-of-the-line-of-sight-in-tilted-disk-syndrome
#2
Pinar Kosekahya, Ozge Sarac, Mustafa Koc, Mehtap Caglayan, Gozde Hondur, Nurullah Cagil
OBJECTIVES: To investigate the shifting of the line of sight (LoS) and the refractive, topographic, and aberrometric parameters that may be associated with the shifting of the LoS in eyes with tilted disk syndrome (TDS). METHODS: Eighty left eyes of 80 subjects with TDS (Study Group) and 70 left eyes of 70 subjects with myopia and astigmatism (Control Group) were included in this study. Line-of-sight coordinates on the horizontal (x) and vertical (y) axes, refractive, topographic, and aberrometric parameters were evaluated...
June 16, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28626823/a-survey-of-ophthalmologists-and-gynecologists-regarding-termination-of-pregnancy-and-choice-of-delivery-mode-in-the-presence-of-eye-diseases
#3
Seyed-Farzad Mohammadi, Mojgan Letafat-Nejad, Elham Ashrafi, Hanieh Delshad-Aghdam
PURPOSE: To evaluate and compare the attitudes of ophthalmologists and gynecologists in suggesting appropriate approach to pregnancy in different ocular conditions. METHODS: Specialty-specific questionnaires on delivery mode and abortion indications for ophthalmic patients (refractive, vascular, oncologic, retinal, glaucoma, postoperation, posttrauma, and infectious) were designed and distributed among physician staff of Farabi Eye Hospital and Yas Women Hospital in Tehran...
June 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28626818/astigmatic-treatment-with-photorefractive-keratectomy-investigations-of%C3%A2-non-keratometric-ocular-astigmatism
#4
Alireza Peyman, Zahra Dastborhan, Mohammadreza Peyman
PURPOSE: To evaluate the effect of non-keratometric ocular astigmatisms on visual and refractive outcomes after photorefractive keratectomy (PRK) for correction of myopic astigmatisms. METHODS: Seventy one eyes of 36 subjects were enrolled in this study. Patients underwent PRK for treatment of myopia. Subjects were evaluated for refractive error, keratometry, and visual acuity before and six months after surgery. Pre- and post-op non-keratometric astigmatisms were calculated by vectorial analysis of the difference between the corneal plane refractive astigmatism and keratometric astigmatism...
June 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28624324/risk-factors-for-rapid-glaucoma-disease-progression
#5
Thomas Chun Wai Chan, Chandra Bala, Anna Siu, Fiona Wan, Andrew White
PURPOSE: To determine the intraocular and systemic risk factor differences between a cohort of rapid glaucoma disease progressors and non-rapid disease progressors. DESIGN: Retrospective case control study Methods SETTING: Five private ophthalmology clinics STUDY POPULATION: 48 rapidly progressing eyes (progression ≥1dB mean deviation (MD)/year) and 486 non-rapidly progressing eyes (progression <1dB MD/year). Patients were eligible if they had a diagnosis of glaucoma from their ophthalmologist and if they had greater than or equal to 5 Humphrey visual fields (24-2) conducted...
June 14, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28622316/corneal-densitometry-after-photorefractive-keratectomy-laser-assisted-in-situ-keratomileusis-and-small-incision-lenticule-extraction
#6
F Poyales, N Garzón, J Mendicute, I Illarramendi, P Caro, O Jáñez, F Argüeso, A López
PurposeThe aim of this study was to gain greater insight into the corneal densitometry changes occurring as a result of refractive surgery and to compare these changes across three widely used surgical techniques, namely, photorefractive keratectomy (PRK), laser-assisted in situ keratomileusis with a femtosecond laser (LASIK-FS), or ReLEx small-incision lenticule extraction (ReLEx SMILE).Patients and methodsThree hundred and thirty-six patients (184 male and 152 female patients) participated in this study. They were split into three groups according to the refractive surgery technique they had undergone: LASIK-FS (74 patients), PRK (153 patients), and ReLEx SMILE (109 patients)...
June 16, 2017: Eye
https://www.readbyqxmd.com/read/28615113/risk-factors-and-long-term-outcomes-in-patients-with-low-intraocular-pressure-after-trabeculectomy
#7
Victoria L Tseng, Carole H Kim, Pablo T Romero, Fei Yu, Kenneth W Robertson-Brown, Lam Phung, Daniel Raygoza, Joseph Caprioli, Anne L Coleman
PURPOSE: To examine risk factors for low intraocular pressure (IOP) after trabeculectomy and to describe long-term outcomes in these eyes. DESIGN: Retrospective case-control study. PARTICIPANTS: Cases with low IOP included all patients with IOP ≤5 mmHg on 3 or more consecutive visits 3 months or later after trabeculectomy. Control patients without low IOP after trabeculectomy were randomly selected at a 1:2 case-to-control ratio. METHODS: A case-control study was performed of patients undergoing trabeculectomy at the Stein Eye Institute...
June 11, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28608800/a-novel-laser-refractive-surgical-treatment-for-presbyopia-optics-based-customization-for-improved-clinical-outcome
#8
Bojan Pajic, Brigitte Pajic-Eggspuehler, Joerg Mueller, Zeljka Cvejic, Harald Studer
Laser Assisted in Situ Keratomileusis (LASIK) is a proven treatment method for corneal refractive surgery. Surgically induced higher order optical aberrations were a major reason why the method was only rarely used to treat presbyopia, an age-related near-vision loss. In this study, a novel customization algorithm for designing multifocal ablation patterns, thereby minimizing induced optical aberrations, was used to treat 36 presbyopic subjects. Results showed that most candidates went from poor visual acuity to uncorrected 20/20 vision or better for near (78%), intermediate (92%), and for distance (86%) vision, six months after surgery...
June 13, 2017: Sensors
https://www.readbyqxmd.com/read/28606616/the-effect-of-previous-soft-contact-lens-wear-on-corneal-refractive-surgery-outcomes
#9
Aoife Lloyd-McKernan, Luisa Simo Mannion, Veronica O'Dwyer
PURPOSE: To examine the influence of previous soft contact lens (SCL) wear on corneal refractive surgery (CRS) outcomes when SCL wear is ceased for two weeks versus twenty-four hours, and also when compared to no wear, prior to CRS. METHODS: A retrospective examination of CRS patient records was carried out for two groups of patients- who ceased SCL wear for two weeks (n=45) and for twenty-four hours (n=49) prior to CRS and compared to a non-contact lens (NCL) control group (n=45 and n=49, respectively)...
June 10, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28606268/-clinical-observation-on-monovision-of-cataract-surgery-with-different-near-addition
#10
J Mu, Y Z Li, Q Wu, L Yan, H Chen
Objective: To observe the influence on spectacle independence, satisfaction and visual function after cataract surgery monovision with different ADD. Methods: Prospective clinical study. All patients were collected from the department of ophthalmology, Shanghai JiaoTong University Affiliated Sixth People's Hospital who were diagnosed as bilateral cataract from Oct. 2013 to Mar. 2015. This study comprised 64 cases (128 eyes). All consecutive patients scheduled to undergo bilateral cataract phacoemulsification and implantation of a monofocal AcrySof IQ IOL...
June 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28604979/femtosecond-laser-assisted-cataract-in-vitreoretinal-surgery
#11
Stanislao Rizzo, Daniela Bacherini, Francesco Faraldi, Marco Pellegrini, Cesare Mariotti
PURPOSE: To assess the safety and surgical results of femtosecond laser-assisted phacovitrectomy. METHODS: Fifteen patients over 50 years of age with coexisting vitreoretinal pathologies and cataract underwent combined femtosecond laser-assisted cataract extraction and sutureless 25-G and 27-G vitreoretinal surgery. RESULTS: The indication for surgery was macular hole in 6 patients, epiretinal membrane in 6, vitreous hemorrhage in 2, and retinal detachment in 1...
June 2, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28602333/resident-and-young-physician-experience-with-complex-cataract-surgery-and-new-cataract-and-refractive-technology-results%C3%A2-of%C3%A2-the%C3%A2-ascrs-2016-young-eye%C3%A2-surgeons%C3%A2-survey
#12
Julie M Schallhorn, Jessica B Ciralsky, Elizabeth Yeu
A survey was offered to attendees of the 2016 annual meeting of the American Society of Cataract and Refractive Surgery (ASCRS) as well as online to ASCRS members. Of the 429 self-identified surgeons in training or those with fewer than 5 years in practice, 83% had performed complex cataract surgery using iris expansion devices or capsular tension rings (63%) and 70% had implanted a toric intraocular lens (IOL). A minority of respondents had performed laser-assisted cataract surgery (27%) or implanted presbyopia-correcting IOLs (39%), and only half (50%) had performed laser vision correction (LVC)...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28602330/mean-shape-of-the-human-limbus
#13
Alejandra Consejo, Clara Llorens-Quintana, Hema Radhakrishnan, D Robert Iskander
PURPOSE: To characterize the mean topographic shape of the limbus of a normal human eye and determine whether it depends on age or refractive power. SETTING: University of Manchester, Manchester, United Kingdom. DESIGN: Prospective case series. METHODS: Participants with no previous ocular surgeries were included in this study. The left eye was measured with a corneoscleral topographer (Eye Surface Profiler). From the raw anterior eye height data, the topographic limbus was demarcated and fitted in 3 dimensions to a circle, an ellipse, and a Fourier series...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28602323/bifocal-nondiffractive-intraocular-lens-for%C3%A2-enhanced-depth-of-focus-in-correcting-presbyopia-clinical-evaluation
#14
Efstathios Vounotrypidis, Raphael Diener, Christian Wertheimer, Thomas Kreutzer, Armin Wolf, Siegfried Priglinger, Wolfgang J Mayer
PURPOSE: To assess the clinical outcomes and patient satisfaction after bilateral cataract surgery with implantation of a bifocal refractive enhanced depth of focus intraocular lens (IOL) with a low near addition (add). SETTING: Department of Ophthalmology, Ludwig-Maximilians-University Munich, Munich, Germany. DESIGN: Prospective longitudinal case series. METHODS: Eyes with bilateral age-related cataract and corneal astigmatism of less than 1...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28601345/comparison-of-12-month-anatomic-and-functional-results-between-z6-femtosecond-laser-assisted-and-manual-trephination-in-deep-anterior-lamellar-keratoplasty-for-advanced-keratoconus
#15
A Blériot, E Martin, P Lebranchu, K Zimmerman, L Libeau, M Weber, B Vabres, I Orignac
The management of severe keratoconus requires corneal transplantation, for which the gold standard is deep anterior lamellar keratoplasty (DALK), preserving the healthy Descemet's membrane and endothelium. The safety and reproducibility of corneal cuts have been improved by the evolution of femtosecond lasers in refractive surgery, and femtosecond laser in DALK would seem to provide the same advantages over the manual method. In our retrospective study, we compare functional and anatomical results of femtosecond-assisted DALK versus manual trephination DALK in patients with keratoconus in stage 4 of the Krumeich classification...
June 7, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28601344/predictability-of-smile-over-four-years-in-high-myopes
#16
J Burazovitch, D Naguzeswski, T Beuste, M Guillard
OBJECTIVE: To determine whether the visual outcomes of the refractive surgery technique small incision lenticule extraction (SMILE), are stable, effective, and predictable for high myopia over a four-year period. RESEARCH DESIGN: This is a retrospective study. The data were collected between March 2012 and July 2016. PARTICIPANTS: Two hundred and forty-eight patients participated in the study; that is, 496 eyes: 140 eyes of 70 patients (52 women/18 men) were classified into the highly myopic group (refraction measured in spherical equivalent (RMSE)>-6 D), and 356 eyes of 178 patients (98 women/80 men) into the control group (RMSE<-6 D)...
June 7, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28599329/-healthcare-research-of-cataract-surgery-analysis-of-patient-s-satisfaction-following-cataract-surgery-in-mecklenburg-vorpommern-germany
#17
Maria Seifried, Helmut Höh
Background The collection of pre-, peri- and postoperative data took place between 2005 and 2008, based on a contract between the social insurance company, AOK Mecklenburg-Vorpommern, and the outpatient cataract surgeons/centers in Mecklenburg-Vorpommern, Germany. The purpose of the contract was the monitoring of quality of cataract surgery in the outpatient healthcare system. Materials and Methods We analysed 2952 datasets of 2952 eyes, remaining after exclusion of 109 datasets because of lack of plausibility and missing data (initially 3058 eyes with surgery in our centre)...
June 9, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28595130/cyclotorsion-measurement-using-scleral-blood-vessels
#18
Aydın Kaya, Ali Seydi Keçeli, Ahmet Burak Can, Hasan Basri Çakmak
BACKGROUND AND OBJECTIVES: Measurements of the cyclotorsional movement of the eye are crucial in refractive surgery procedures. The planned surgery pattern may vary substantially during an operation because of the position and eye movements of the patient. Since these factors affect the outcome of an operation, eye registration methods are applied in order to compensate for errors. While the majority of applications are based on features of the iris, we propose a registration method which uses scleral blood vessels...
June 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28594648/risk-profiles-of-ectasia-after-keratorefractive-surgery
#19
Pushpanjali Giri, Dimitri T Azar
PURPOSE OF REVIEW: To identify and evaluate the risk factors of iatrogenic ectasia after refractive surgery. RECENT FINDINGS: We reviewed recently published papers that identified various risk factors associated with ectasia after LASIK, photorefractive keratectomy, small incision lenticule extraction, and other refractive surgical procedures. We also attempted to evaluate the relative contributions of these factors to the development of ectasia following refractive surgery...
July 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28591507/-regarding-surface-ablation-as-an-ethically-superior-option-when-compared-to-lasik-primum-non-nocere
#20
Kepa Balparda
Refractive surgery is an extremely safe surgical intervention, with excellent profiles of clinical improvement and satisfaction. The ethical responsibility of the refractive surgeon is to look for diminishing the patients' exposure to unnecessary risks. Therefore, surface ablation would be a preferable option over LASIK as the former has a better safety profile than the latter, without compromising final visual acuity. Ethically, surface ablation should be considered as the first choice in those patients undergoing Excimer laser refractive surgery...
July 2017: Revista Médica del Instituto Mexicano del Seguro Social
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