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Aberrometry

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https://www.readbyqxmd.com/read/29219897/management-of-complex-epithelial-ingrowth-after-laser-in-situ-keratomileusis-using-fibrin-tissue-glue
#1
Lisa Y Chen, Jennifer S Kung, Edward E Manche
OBJECTIVES: To evaluate the efficacy and safety of adjunctive fibrin tissue glue in the treatment of complex epithelial ingrowth after laser in situ keratomileusis (LASIK). METHODS: A retrospective review was performed of 12 eyes in 12 patients treated for clinically significant epithelial ingrowth after LASIK with mechanical debridement of the ingrowth and placement of fibrin tissue glue. Primary outcome measurements including recurrence of ingrowth, visual acuity, and manifest refraction were evaluated at each postoperative examination...
December 5, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29215394/visual-outcomes-and-aberrometric-changes-with-topography-guided-photorefractive-keratectomy-treatment-of-irregular-astigmatism-after-penetrating-keratoplasty
#2
Francisco Bandeira E Silva, Rossen Mihaylov Hazarbassanov, Eduardo Martines, José Luis Güell, Ana L Hofling-Lima
PURPOSE: To evaluate the visual acuity and keratometric and aberrometric changes in patients with corneal transplants (PKP), who underwent topography-guided photorefractive keratectomy (TG-PRK) with mitomycin C (MMC). METHODS: In this case study, 15 patients with spherical equivalents ranging from -11.00 to -0.25 diopters (D) who underwent penetrating corneal transplantation and had irregular astigmatism ranging from -7.5 to -2.0 D underwent TG-PRK with MMC. Corneal topography and wavefront of all patients were measured preoperatively and 12 months postoperatively...
December 5, 2017: Cornea
https://www.readbyqxmd.com/read/29208810/optimizing-outcomes-with-toric-intraocular-lenses
#3
REVIEW
Manpreet Kaur, Farin Shaikh, Ruchita Falera, Jeewan S Titiyal
Toric intraocular lenses (IOLs) are the procedure of choice to correct corneal astigmatism of 1 D or more in cases undergoing cataract surgery. Comprehensive literature search was performed in MEDLINE using "toric intraocular lenses," "astigmatism," and "cataract surgery" as keywords. The outcomes after toric IOL implantation are influenced by numerous factors, right from the preoperative case selection and investigations to accurate intraoperative alignment and postoperative care. Enhanced accuracy of keratometry estimation may be achieved by taking multiple measurements and employing at least two separate devices based on different principles...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29185116/standard-transepithelial-and-iontophoresis-corneal-cross-linking-clinical-analysis-of-three-surgical-techniques
#4
Settimio Rossi, Carmine Santamaria, Rosa Boccia, Luigi De Rosa, Francesco Maria D'Alterio, Francesca Simonelli, Giuseppe De Rosa
BACKGROUND: To evaluate the clinical results of standard, transepithelial (TE) and iontophoresis (I) corneal cross-linking (CXL), in patients with progressive keratoconus. METHODS: Thirty eyes of 30 patients with progressive keratoconus treated by CXL (10 by standard-CXL, 10 by TE-CXL and 10 by I-TE-CXL) with 12 months of follow-up. Pre- and postoperative ophthalmologic testing were: uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refractive examination (spherical error, spherical equivalent), corneal topography (corneal astigmatism, simulated maximum, minimum and average keratometry), aberrometry (coma and spherical aberration), pachymetry and endothelial cell density...
November 28, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29146479/visual-outcome-of-penetrating-keratoplasty-deep-anterior-lamellar-keratoplasty-and-descemet-membrane-endothelial-keratoplasty
#5
Clàudia Garrido, Genís Cardona, Josep L Güell, Jaume Pujol
PURPOSE: A single-center, cross-sectional study was designed to assess and compare objective and subjective quality of vision of patients intervened with penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK) and Descemet membrane endothelial keratoplasty (DMEK). METHODS: Forty-six patients previously intervened with PK (22 eyes), DALK (7 eyes) and DMEK (17 eyes) were recruited. Visual evaluation included spherical and cylindrical refraction, distance corrected visual acuity (DCVA), photopic contrast sensitivity (CS), optical quality, measured with the HD Analyzer (objective scattering index [OSI], MTF cut-off and Strehl ratio), and ocular and corneal aberrometry, measured with the KR-1W Wavefront Analyzer...
November 13, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/29117417/repeatability-of-a-commercially-available-adaptive-optics-visual-simulator-and-aberrometer-in-normal-and-keratoconic-eyes
#6
Rohit Shetty, Shruti Kochar, Tushar Grover, Pooja Khamar, Pallak Kusumgar, Kanchan Sainani, Abhijit Sinha Roy
PURPOSE: To evaluate the repeatability of aberration measurement obtained by a Hartmann-Shack aberrometer combined with a visual adaptive optics simulator in normal and keratoconic eyes. METHODS: One hundred fifteen normal eyes and 92 eyes with grade I and II keratoconus, as per the Amsler-Krumeich classification, were included in the study. To evaluate the repeatability, three consecutive measurements of ocular aberrations were obtained by a single operator. Zernike analyses up to the 5th order for a pupil size of 4...
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29061607/prevalence-and-risk-factors-of-eye-diseases-in-adult-patients-with-obstructive-sleep-apnoea-results-from-the-sle-e-p-y-cohort-study
#7
Emilio Pedrotti, Christian Luigi Demasi, Enrico Bruni, Francesca Bosello, Paolo Plinio Di Sarro, Mattia Passilongo, Adriano Fasolo, Nicola Gennaro, Alessandra De Gregorio, Marcello Ferrari, Giorgio Marchini
OBJECTIVES: To assess the occurrence of glaucoma, eyelid, corneal and macular disorders in a cohort of patients with obstructive sleep apnoea (OSA) diagnosed by overnight polysomnography and to investigate into the risk factors for the above eye diseases (EDs). DESIGN: Cross-sectional cohort study between 2014 and 2015. SETTING: Unit of Respiratory Medicine and Eye Clinic of the University of Verona. PARTICIPANTS: 431 consecutive patients were considered eligible...
October 22, 2017: BMJ Open
https://www.readbyqxmd.com/read/29035922/effect-of-scattering-and-aberrations-on-visual-acuity-for-band-keratopathy
#8
Kazutaka Kamiya, Hidenaga Kobashi, Masahide Takahashi, Nobuyuki Shoji, Kimiya Shimizu
SIGNIFICANCE: The progressive accumulation of the calcification may deteriorate corneal transparency, especially in the interpalpebral area, and subsequent visual performance for patients with band keratopathy. However, the detailed quantitative analysis of light scattering or higher-order aberrations on visual performance for these patients so far has not been elucidated. PURPOSE: The aim of this study was to assess the relationship of intraocular forward scattering, corneal backward scattering, and corneal higher-order aberrations with visual acuity in eyes with band keratopathy...
November 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29027083/objective-and-subjective-results-following-implantation-of-the-finevision-trifocal-intraocular-lens-in-mexican-patients
#9
Ivo Ferreira-Ríos, Karla Zuñiga-Posselt, Juan Carlos Serna-Ojeda, Eduardo Chávez-Mondragón
PURPOSE: To evaluate objective and subjective results after bilateral implantation of a diffractive trifocal intraocular lens (IOL) in a Mexican population. METHODS: Prospective, interventional case series involved 15 cataract surgery patients who underwent bilateral implantation of the trifocal Micro F lens FineVision IOL (PhysIOL, Liège, Belgium). Objective analysis involved assessment of monocular uncorrected distance (UDVA), near (UNVA) at 30 and 40 cm, and intermediate visual acuity (UIVA) at 50, 60, and 70 cm, preoperatively, and at postoperative months 1, 3, and 6...
October 12, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29023989/impact-of-contact-lens-material-and-design-on-the-ocular-surface
#10
Javier Ruiz-Alcocer, Daniel Monsálvez-Romín, Santiago García-Lázaro, César Albarrán-Diego, José Luis Hernández-Verdejo, David Madrid-Costa
BACKGROUND: To evaluate the impact on the ocular surface of a daily disposable hydrogel contact lens with high water content compared with two silicone hydrogel daily disposable lenses of lower water content. METHODS: The hydrogel lens assessed was made from nesofilcon A and the silicone hydrogel lenses were made of delefilcon A and stenfilcon A. Contact lens thickness was measured to assess material stability during daily wear, and ocular surface parameters such as tear film osmolarity, tear meniscus area and central corneal thickness were also assessed...
October 11, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28993070/the-effect-of-soft-contact-lens-thickness-in-visual-function-after-intracorneal-ring-segments-surgery
#11
G Carracedo, J Canales, P Gonzalez, A Rechionni, C Carpena-Torres, J Carballo-Álvarez
OBJECTIVE: To study the influence of soft contact lens (SCL) central thickness and material in keratoconus on visual function after intracorneal ring segment (ICRS) surgery. METHODS: A pilot, experimental, prospective, cross-sectional and double-blind study was performed. Fourteen keratoconus patients with age range of 34.75±9.22years (7 males and 7 females) with ICRS implanted were involved in the study. Two different SCL materials [Hioxifilcon A (G-5X/p-GMA/HEMA) and Lucifilcon A (silicone-hydrogel)] with four different central thicknesses (0...
October 6, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28914632/stepwise-guided-photorefractive-keratectomy-in-treatment-of-irregular-astigmatism-after-penetrating-keratoplasty-and-deep-anterior-lamellar-keratoplasty
#12
Nir Sorkin, Adi Einan-Lifshitz, Sagi Abelson, Tanguy Boutin, Mahmood Showail, Armand Borovik, Zach Ashkenazy, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of stepwise ablation using topography-guided photorefractive keratectomy to treat irregular astigmatism after either penetrating keratoplasty (PKP) or deep anterior lamellar keratoplasty (DALK). METHODS: This is a retrospective, interventional analysis including patients with irregular astigmatism after either PKP or DALK, who underwent topography-guided photorefractive keratectomy. The entire cohort was analyzed, as well as the PKP and DALK groups separately...
September 12, 2017: Cornea
https://www.readbyqxmd.com/read/28905823/refractive-outcomes-of-intraoperative-wavefront-aberrometry-versus-optical-biometry-alone-for-intraocular-lens-power-calculation
#13
Zina Zhang, Logan William Thomas, Szu-Yen Leu, Steven Carter, Sumit Garg
PURPOSE: To compare the outcomes of intraoperative wavefront aberrometry versus optical biometry alone for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery with monofocal IOL implantation. METHODS: Preoperative data were obtained with the IOLMaster. Intraoperative aphakic measurements and IOL power calculations were obtained in some patients with the optiwave refractive analysis (ORA) system. Analysis was performed to determine the accuracy of monofocal IOL power prediction and postoperative manifest refraction at 1 month of the ORA versus IOLMaster...
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28815191/a-randomized-fellow-eye-comparison-of-keratometry-aberrometry-tear-film-axial-length-and-the-anterior-chamber-depth-after-eye-rubbing-in-non-keratoconic-eyes
#14
Jordan V Chervenkoff, Elizabeth Hawkes, Gabriela Ortiz, Deborah Horney, Mayank A Nanavaty
BACKGROUND: To investigate the effect of eye rubbing on keratometry (K), aberrometry, tear film break-up-time (TFBUT) and anterior chamber depth (ACD). METHODS: Volunteers without any corneal pathology or dry eyes were randomised to rubbing in one eye and the fellow-eye was control. Eye rubbing was performed for 2 min. Primary outcomes studied were anterior and posterior K changes. Secondary outcomes were changes in TFBUT, axial length (AL) & ACD, K changes in various zones, asphericity and aberrometry...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28808586/quality-of-vision-after-deep-anterior-lamellar-keratoplasty-fluid-dissection-compared-to-penetrating-keratoplasty-for-the-treatment-of-keratoconus
#15
Islam Mahmoud Hamdi, Momen Mahmoud Hamdi
PURPOSE: To compare the visual quality of patients with keratoconus who underwent penetrating keratoplasty (PKP) or deep anterior lamellar keratoplasty (DALK) with fluid dissection. DESIGN: Cross-sectional, observational study. METHODS: Twelve eyes that underwent PKP (PKP group) were compared to 24 eyes that underwent DALK (DALK group) after complete removal of sutures and stability of refraction. Visual, refractive, corneal topographic, corneal aberrometry, and ocular aberrometry parameters were compared for both groups...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28737665/refractive-and-corneal-aberrometric-changes-after-crescentic-lamellar-wedge-resection-in-pellucid-marginal-degeneration
#16
Selim Genç, Hanefi Çakır, Emre Güler, Ümit Çallı
OBJECTIVE: To evaluate the effectiveness of crescentic corneal lamellar wedge resection for the treatment of pellucid marginal degeneration (PMD) in improving refractive, visual, and corneal aberrometry. METHODS: The study included 10 eyes of 10 patients who had undergone corneal lamellar wedge resection for PMD. Pellucid marginal degeneration was diagnosed based on the clinical signs and corneal topography. The corneal aberrometry was evaluated with Sirius corneal topography...
July 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28736657/high-temporal-resolution-aberrometry-in-a-50-eye-population-and-implications-for-adaptive-optics-error-budget
#17
Jessica Jarosz, Pedro Mecê, Jean-Marc Conan, Cyril Petit, Michel Paques, Serge Meimon
We formed a database gathering the wavefront aberrations of 50 healthy eyes measured with an original custom-built Shack-Hartmann aberrometer at a temporal frequency of 236 Hz, with 22 lenslets across a 7-mm diameter pupil, for a duration of 20 s. With this database, we draw statistics on the spatial and temporal behavior of the dynamic aberrations of the eye. Dynamic aberrations were studied on a 5-mm diameter pupil and on a 3.4 s sequence between blinks. We noted that, on average, temporal wavefront variance exhibits a n(-2) power-law with radial order n and temporal spectra follow a f(-1...
April 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28727613/aberrometry-repeatability-and-agreement-with-autorefraction
#18
Mylan T Nguyen, David A Berntsen
SIGNIFICANCE: Commercially available aberrometers are essential to clinical studies evaluating refractive error and image quality. The Discovery System (Innovative Visual Systems, Elmhurst, IL) is a promising clinical instrument that allows investigators to export aberration data for research and analysis purposes. An assessment of the Discovery System's performance is essential to the interpretation of the data obtained. PURPOSE: The aims of this study were to determine the between-visit repeatability of refractive error and higher-order aberration measurements with the Discovery System and to examine between-instrument agreement of refractive error measurements with the Discovery System and Grand Seiko WAM-5500 open-field autorefractor (Grand Seiko Co...
September 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28647461/toric-intraocular-lenses-versus-peripheral-corneal-relaxing-incisions-for-astigmatism-between-0-75-and-2-5-diopters-during-cataract%C3%A2-surgery
#19
RANDOMIZED CONTROLLED TRIAL
Mayank A Nanavaty, Kaveeta K Bedi, Shahnaz Ali, Mathew Holmes, Saul Rajak
PURPOSE: To compare the outcomes after toric intraocular lens (tIOL) or peripheral corneal relaxing incisions (PCRI) for keratometric astigmatism (KA) between 0.75 and 2.5 diopters (D) during cataract surgery. DESIGN: Prospective randomized clinical trial. METHODS: Eighty eyes (80 participants) received either tIOL or PCRI and were assessed preoperatively, 1, 3, 6, and 12 months postoperatively. PRIMARY OUTCOME MEASURE: Uncorrected (UCDVA) and best-corrected distance logMAR visual acuity (BCDVA) at 12 months...
August 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28586914/visual-performance-and-optical-quality-of-standardized-asymmetric-soft-contact-lenses-in-patients-with-keratoconus
#20
Asaki Suzaki, Naoyuki Maeda, Mutsumi Fuchihata, Shizuka Koh, Kohji Nishida, Takashi Fujikado
Purpose: To evaluate the visual performance and optical quality of a standardized asymmetric soft contact lens (SCL) used for correction of higher-order aberrations (HOAs) in eyes with keratoconus. Methods: We included 30 eyes (26 patients) with keratoconus (average K: 45.7 ± 2.3 diopters [D]). The patients were subjected to corneal tomography, aberrometry, measurements of manifest refraction and visual acuity (VA), and visual analog scale (VAS) assessments. The study lenses were made using a molding method and consisted of six standardized types, in which an asymmetric power distribution of approximately 2 to 12 D (2-D step) was used to correct HOAs...
June 1, 2017: Investigative Ophthalmology & Visual Science
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