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Paolo Vinciguerra, Vito Romano, Pietro Rosetta, Emanuela F Legrottaglie, Raffaele Piscopo, Claudia Fabiani, Claudio Azzolini, Riccardo Vinciguerra
PURPOSE: To compare 1-year transepithelial corneal collagen cross-linking with iontophoresis (I-CXL) outcomes with standard CXL (S-CXL) epithelium-off for progressive keratoconus. METHODS: Forty eyes of 40 patients with progressive keratoconus were included in this comparative, prospective clinical study. Corrected distance visual acuity (CDVA), spherical equivalent, cylinder refraction, corneal topography, Scheimpflug tomography, aberrometry, and endothelial cell count were assessed at baseline and at 1, 3, 6, and 12 months of follow-up...
October 1, 2016: Journal of Refractive Surgery
Mehrdad Mohammadpour, Zahra Heidari, Hossein Mohammad-Rabei, Ebrahim Jafarzadehpur, Mahmoud Jabbarvand, Hassan Hashemi, Mehdi Khabazkhoob
PURPOSE: To evaluate the correlation between refractive, corneal, and residual astigmatism and higher order aberrations (HOA) in refractive surgery candidates. METHODS: Three hundred and seventy-five eyes of 188 patients aged 28.2 ± 6.24 years with a predominance of females (62.7%) were enrolled in this study. Refraction, topography (Orbscan IIz, Bausch & Lomb, Rochester, NY, USA), and aberrometry (Zywave, Bausch & Lomb, Rochester, NY, USA) were performed to determine refractive and corneal astigmatism and HOA for all participants...
September 2016: Journal of Current Ophthalmology
Paolo Vinciguerra, Vito Romano, Pietro Rosetta, Emanuela F Legrottaglie, Magdalena Kubrak-Kisza, Claudio Azzolini, Riccardo Vinciguerra
Purpose. To report the early outcomes of iontophoresis-assisted corneal collagen cross-linking procedure with epithelial debridement (I-SCXL). Methods. Twenty eyes of twenty patients with progressive keratoconus were included in this prospective clinical study. Best spectacle corrected visual acuity (BSCVA), sphere and cylinder refraction, corneal topography, Scheimpflug tomography, aberrometry, anterior segment optical coherence tomography (AS-OCT), and endothelial cell count were assessed at baseline and at 1, 3, and 6 months of follow-up...
2016: BioMed Research International
Anneli Fredriksson, Anders Behndig
PURPOSE: To compare objective refraction using small-zone eccentric laser ray tracing (LRT) wavefront aberrometry to standard autorefraction in keratoconus (KC), and whether the visual acuities achieved with these refractions differ from corresponding values in healthy eyes. METHODS: Twenty-nine eyes of 29 patients with KC and 29 eyes of 29 healthy controls were included in this prospective unmasked case-control study. The uncorrected (UCVA) and spectacle-corrected (SCVA) Early Treatment Diabetic Retinopathy Study (ETDRS) visual acuities based on refractions derived from LRT in central and four eccentric zones were compared to those achieved with standard autorefraction...
November 2016: Acta Ophthalmologica
Samuel Masket, Nicole R Fram, Jack T Holladay
PURPOSE: To determine whether the presence of an ophthalmic viscosurgical device (OVD) in the anterior chamber influences intraoperative aberrometry and the suggested intraocular lens (IOL) power. SETTING: Advanced Vision Care, Los Angeles, and Specialty Surgery Center, Beverly Hills, California, USA. DESIGN: Prospective interventional case series. METHOD: Eyes scheduled for routine phacoemulsification and were divided into 6 equal groups, with each having 1 of 6 OVDs...
July 2016: Journal of Cataract and Refractive Surgery
Mario Augusto Pereira Dias Chaves, Wilson Takashi Hida, Patrick Frenzel Tzeliks, Michelle Rodrigues Gonçalves, Fernando de Bortoli Nogueira, Celso Takashi Nakano, Antonio Francisco Pimenta Motta, André Gustavo Rolim de Araújo, Milton Ruiz Alves
PURPOSE: To compare the optical performance and visual outcomes between two diffractive multifocal lenses: AMO Tecnis® ZMB00 and AcrySof® ReSTOR® SN6AD1. METHODS: This prospective, non-randomized comparative study included the assessment of 74 eyes in 37 patients referred for cataract surgery and candidates for multifocal intraocular lens implants. Exclusion criteria included existence of any other eye disease, previous eye surgery, high axial myopia, preoperative corneal astigmatism of >1...
May 2016: Arquivos Brasileiros de Oftalmologia
Tiago B Ferreira, Tos T J M Berendschot, Filomena J Ribeiro
PURPOSE: To evaluate the visual outcomes of patients who underwent cataract surgery with implantation of a transitional toric monofocal intraocular lens (IOL) (Precizon Toric IOL, model 565; Ophtec BV, Groningen, The Netherlands). METHODS: In this prospective case series, 51 eyes of 39 patients with cataract and regular keratometric astigmatism between 1.00 and 4.50 diopters (D) that had phacoemulsification with implantation of a Precizon Toric IOL were included...
July 1, 2016: Journal of Refractive Surgery
Sara Perches, M Victoria Collados, Jorge Ares
PURPOSE: To establish the repeatability and reproducibility of a virtual refraction process using simulated retinal images. METHODS: With simulation software, aberrated images corresponding with each step of the refraction process were calculated following the typical protocol of conventional subjective refraction. Fifty external examiners judged simulated retinal images until the best sphero-cylindrical refraction and the best visual acuity were achieved starting from the aberrometry data of three patients...
October 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Prema Padmanabhan, Sudhir Rachapalle Reddi, Poornima Devi Sivakumar
PURPOSE: To report the refractive, topographic, tomographic, and aberrometric characteristics of post-LASIK ectasia; to compare these characteristics with normal post-LASIK controls; and to propose a comprehensive system to grade the severity of post-LASIK ectasia. METHODS: The refraction, corrected distance visual acuity (CDVA), magnitude, and location of the steepest and thinnest point on the cornea, the highest anterior and posterior surface elevation, the radius of best fit sphere, corneal asphericity, and corneal aberrations were measured in 50 eyes of 29 patients with post-LASIK ectasia...
July 6, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Michael G Woodcock, Robert Lehmann, Robert J Cionni, Michael Breen, Maria C Scott
PURPOSE: To compare astigmatic outcomes in patients with bilateral cataracts having toric intraocular lens (IOL) implantation with intraoperative aberrometry measurements in 1 eye and standard power calculation and a toric IOL calculator with inked axis marking in the contralateral eye. SETTING: Twelve sites in the United States. DESIGN: Prospective cohort study. METHODS: The eye with the more visually significant cataract was randomized to intraoperative aberrometry measurements (Ocular Response Analyzer with Verifeye) or standard preoperative biometry and use of a toric calculator with the contralateral eye automatically assigned to the other group...
June 2016: Journal of Cataract and Refractive Surgery
Hamid Gharaee, Siamak Zaree Ghanavati, Saeed Shokoohi Rad, Arash Omidtabrizi, Hashem Naseri
PURPOSE: To investigate the efficacy of Technolas 217Z eye tracking system (torsional component) in corneal surface irregularity and high order aberrations (HOAs) after photorefractive keratectomy. METHODS: Patients with compound myopic astigmatism among persons demanding refractive surgery in Khatam-al-Anbia Eye Hospital with the mean age of 29 years were enrolled in this double-blind randomized interventional study. The mean spherical equivalent (SE) of refractive error was -4...
September 2015: Journal of Current Ophthalmology
Ahmed Sivardeen, Deborah Laughton, James S Wolffsohn
PURPOSE: To determine the utility of a range of clinical and non-clinical indicators to aid the initial selection of the optimum presbyopic contact lens. In addition, to assess whether lens preference was influenced by the visual performance compared to the other designs trialled (intra-subject) or compared to participants who preferred other designs (inter-subject). METHODS: A double-masked randomised crossover trial of Air Optix Aqua multifocal, PureVision 2 for Presbyopia, Acuvue OASYS for Presbyopia, Biofinity multifocal and monovision was conducted on 35 presbyopes (54...
October 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
Hwa Lee, Sungmin Jang, Minsoo Park, Jinhwan Park, Sehyun Baek
PURPOSE: To quantify and compare higher-order aberrations (HOAs) in children after epiblepharon surgery. METHODS: The medical records of children (mean age, 7.3 years [range, 2-13 years]) who underwent surgery for epiblepharon were reviewed retrospectively. Aberrometry was conducted before surgery and at 1 month's and 3 months' follow-up using the Wavefront Analyzer KR-1W. Corneal HOAs in the 4 mm and 6 mm optical zones were compared. Classification of the severity of epiblepharon was based on the degree of cilia touching the cornea and corneal erosion...
June 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Kazutaka Kamiya, Hidenaga Kobashi, Akihito Igarashi, Nobuyuki Shoji, Kimiya Shimizu
This study was aimed to assess the relationship of intraocular forward scattering, corneal backward scattering, and corneal higher-order aberrations (HOAs) with corrected distance visual acuity (CDVA) in eyes with granular corneal dystrophy (GCD). We retrospectively examined forty two eyes of 42 consecutive patients who diagnosed GCD, and age-matched 20 eyes of 20 healthy subjects. We assessed objective scattering index (OSI) using the double-pass instrument (OQAS II, Visiometrics), corneal densitometry (CD) using the Scheimpflug rotating camera (Pentacam HR, Oculus), and corneal HOAs using the Hartmann-Shack aberrometry (KR-9000, Topcon)...
2016: Scientific Reports
Fernando Faria-Correia, Isaac Ramos, Bernardo Lopes, Tiago Monteiro, Nuno Franqueira, Renato Ambrósio
PURPOSE: To describe the Dysfunctional Lens Index (DLI) from ray-tracing aberrometry and to test its correlations with logMAR corrected distance visual acuity (CDVA) and lens grading based on the Lens Opacities Classification System III (LOCS III) and the Scheimpflug-based lens density. METHODS: The DLI was calculated by the i-Trace Visual Functional Analyzer (Tracey Technologies, Houston, TX). Forty eyes of 30 patients with mild to moderate age-related nuclear cataract were included retrospectively...
April 2016: Journal of Refractive Surgery
Fernando Faria-Correia, Bernardo Lopes, Tiago Monteiro, Nuno Franqueira, Renato Ambrósio
PURPOSE: To test correlations between Scheimpflug optical densitometry and ocular higher-order aberrations (HOAs) in patients with mild nuclear cataract. SETTING: Cornea and Refractive Surgery Department, Hospital de Braga, Braga, Portugal. DESIGN: Retrospective single-center study. METHODS: In eyes with mild nuclear cataract, lens densitometry was evaluated by Scheimpflug imaging (Pentacam HR), which provided an objective quantification (mean density and maximum density) and grading (nuclear staging score) of the crystalline lens...
March 2016: Journal of Cataract and Refractive Surgery
Ralf Blendowske, Max Kalb
PURPOSE: We report transient ocular wavefront and blood glucose data for one patient with acute type 1 diabetes mellitus after the treatment with insulin has been initiated. CASE REPORT: The wavefront data for both eyes of a 34-year-old male patient were examined by a Hartmann-Shack wavefront sensor. Refraction data and higher-order aberrations were recorded during 130 days for eyes in natural conditions, without cycloplegia. At the beginning, we sampled data every 3 to 4 days and enlarged the intervals, when values settled...
July 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Gaurav Prakash, Dhruv Srivastava, Sounak Choudhuri, Ruthchel Bacero
PURPOSE: To compare the ocular monochromatic higher-order aberration. (HOA) profile in normal refractive surgery candidates of Arab and South Asian origin. METHODS: This cross-sectional, observational, comparative study was performed in the cornea department of a specialty hospital. Normal refractive surgery candidates with no ocular morbidity except refractive error were recruited. Refractive surgery candidates underwent a preoperative evaluation, including wavefront aberrometry with the iDesign aberrometer (AMO, Inc...
January 2016: Middle East African Journal of Ophthalmology
Praveen K Bandela, PremNandhini Satgunam, Prashant Garg, Shrikant R Bharadwaj
BACKGROUND: Clarity of the transplanted tissue and restoration of visual acuity are the two primary metrics for evaluating the success of corneal transplantation. Participation of the transplanted eye in habitual binocular viewing is seldom evaluated post-operatively. In unilateral corneal disease, the transplanted eye may remain functionally inactive during binocular viewing due to its suboptimal visual acuity and poor image quality, vis-à-vis the healthy fellow eye. METHODS AND FINDINGS: This study prospectively quantified the contribution of the transplanted eye towards habitual binocular viewing in 25 cases with unilateral transplants [40 yrs (IQR: 32-42 yrs) and 25 age-matched controls [30 yrs (25-37 yrs)]...
2016: PloS One
S Delgado, J Velazco, R M Delgado Pelayo, N Ruiz-Quintero
OBJECTIVE: To determine the correlation of higher order aberrations in anterior corneal surface and degree of keratoconus measured with a Scheimpflug camera. MATERIAL AND METHODS: A descriptive, cross-sectional study was conducted on 152 eyes (both eyes of each patient) of patients with keratoconus, from January 2009 to April 2014. An examination was performed on the corneal aberrometry in the anterior corneal surface, and topographic mapping (by Amsler and Muckenhirn classification) was used to determine the degree of keratoconus...
July 2016: Archivos de la Sociedad Española de Oftalmología
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