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https://www.readbyqxmd.com/read/27902509/paecilomyces-lilacinus-keratitis-in-a-soft-contact-lens-wearer
#1
Rosa Monno, Giovanni Alessio, Silvana Guerriero, Carmen Capolongo, Carla Calia, Luciana Fumarola, Carlo Pazzani, Anna Di Taranto, Giuseppe Miragliotta
We describe a case of keratitis caused by Paecilomyces lilacinus in a contact lens wearer with a history of diabetes.
November 29, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27898516/clinical-evaluation-of-large-diameter-rigid-gas-permeable-versus-soft-toric-contact-lenses-for-the-correction-of-refractive-astigmatism-a-multicenter-study
#2
Langis Michaud, Edward S Bennett, Stephanie L Woo, Renee Reeder, Bruce W Morgan, Amy Dinardo, Jennifer S Harthan
PURPOSE: This study aims to address the clinical performance of a large diameter rigid gas permeable lens (LRGP) in a group of subjects with low-to-moderate (0.75-2.75 D) refractive astigmatism. An additional goal was to determine whether soft toric or LRGP contact lenses performed better objectively in the correction of astigmatism and to determine which modality is preferred by subjects. METHODS: This was a multisite prospective cross-over clinical study. Ten asymptomatic contact lens wearers per site (four university clinics) were recruited and randomly assigned to group A or group B...
November 24, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27880992/studies-using-concentric-ring-bifocal-and-peripheral-add-multifocal-contact-lenses-to-slow-myopia-progression-in-school-aged-children-a-meta-analysis
#3
Shi-Ming Li, Meng-Tian Kang, Shan-Shan Wu, Bo Meng, Yun-Yun Sun, Shi-Fei Wei, Luoru Liu, Xiaoxia Peng, Zhuo Chen, Fengju Zhang, Ningli Wang
PURPOSE: To evaluate the effect of soft contact lens with concentric ring bifocal and peripheral add multifocal designs on controlling myopia progression in school-aged children. METHODS: We systematically searched MEDLINE, EMBASE, Cochrane Library and reference lists of included trials. Methodological quality of included trials was assessed using Jadad Scale and Newcastle-Ottawa Quality Assessment Scale items. RESULTS: We identified five randomised controlled trials (RCTs) and three cohort studies with a total of 587 myopic children...
November 23, 2016: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27879499/impact-of-spherical-aberration-terms-on-multifocal-contact-lens-performance
#4
Cathleen Fedtke, Jennifer Sha, Varghese Thomas, Klaus Ehrmann, Ravi C Bakaraju
PURPOSE: To investigate the impact of the primary (PSA) and secondary (SSA) spherical aberration terms on visual performance (VP) in presbyopes, as measured using multifocal (MFCL) soft contact lenses on eye. METHODS: Seventeen presbyopes (age: 55.1 ± 6.9 years) wore seven commercial lenses (four center-near (MFCL N), one center-distance (MFCL D), one bifocal, and one single vision control). Unaided and with each lens on eye, the PSA and SSA terms were obtained with an aberrometer, the BHVI-EyeMapper (low illumination, natural and 4 mm pupil diameter)...
November 22, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27870779/painless-acanthamoeba-keratitis-with-normal-vision
#5
Pui Wai Rachel Kwok, Ka Wai Kam, Vishal Jhanji, Alvin L Young
PURPOSE: To report an atypical case of contact lens-related Acanthamoeba keratitis. CASE REPORT: A 15-year-old secondary school female student with a history of soft contact lens wear was referred to our hospital by a private general practitioner for management of right eye redness and discomfort for 2 weeks. Upon examination, the best-corrected visual acuity was 20/20 and 20/16 for her right and left eyes, respectively. There was diffuse radial keratoneuritis noted in the cornea of her right eye without any associated epithelial defect...
November 19, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27866955/analysis-of-the-power-profile-of-a-new-soft-contact-lens-for-myopia-progression
#6
Javier Ruiz-Alcocer
No abstract text is available yet for this article.
November 17, 2016: Journal of Optometry
https://www.readbyqxmd.com/read/27861262/tear-film-osmolarity-in-response-to-long-term-orthokeratology-treatment
#7
Amelia Nieto-Bona, María Nombela-Palomo, Gema Felipe-Márquez, Miguel A Teus
PURPOSE: To compare tear film osmolarity (TFO) measurements in non-contact lens (CL) wearers and wearers of hydrogel or overnight orthokeratology (OK) CLs, and to assess possible effects of long-term OK on TFO. METHODS: Overall, 108 subjects with moderate myopia participated in 2 experiments, and TFO was measured using the TearLab osmolarity system. In experiment 1, TFO measurements were made in 77 right eyes of 23 non-CL wearers, 26 hydrogel wearers, and 28 OK wearers...
November 16, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27818113/factors-in-the-success-of-new-contact-lens-wearers
#8
Anna Sulley, Graeme Young, Chris Hunt
PURPOSE: To determine the first-year retention rate for patients fitted with contact lenses (CLs) and identify factors associated with retention and dropout. METHODS: This multi-site study was a retrospective chart review of the status of neophyte CL wearers fitted in representative UK eye care practices. RESULTS: Consecutive records for 524 patients at 29 sites were reviewed. Mean age at dispensing was 34 years (range 8-79), 68% were under 45 years and 61% female...
November 3, 2016: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/27800638/soft-multifocal-simultaneous-image-contact-lenses-a-review
#9
REVIEW
Roque Pérez-Prados, David P Piñero, Rafael J Pérez-Cambrodí, David Madrid-Costa
Soft multifocal simultaneous image contact lenses have boomed in recent years due to the growing number of presbyopic patients demanding visual solutions, allowing them to maintain their current standard of living. The concept of 'simultaneous image' is based on blur interpretation and/or blur tolerance of superimposed multiple images on the retina formed by various powers of a contact lens. This is the basis for a specific type of multifocal contact lens developed for the compensation of presbyopia. Manufacturers have released a great variety of soft simultaneous image lens designs to meet different patient needs but their fitting is still unsatisfactory in some cases...
November 1, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27791229/raman-imaging-of-layered-soft-contact-lenses
#10
Katarzyna Krysztofiak, Kamila Ciężar, Mikołaj Kościński
BACKGROUND: Daily disposable contact lenses are gaining in popularity among practitioners and wearers for the improved ocular health and subjective outcomes they offer. Recently a novel daily disposable contact lens material with water gradient technology was introduced. Delefilcon A lenses consist of a 33% water content silicone hydrogel core and an outer hydrogel layer which is totally free of silicone and contains 80% water. METHODS: The aim of the present study was to confirm the layered structure of delefilcon A contact lenses...
October 27, 2016: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/27790772/temporal-changes-in-contact-lens-comfort-over-a-day-of-wear
#11
Craig A Woods, Sharon A Bentley, Desmond Fonn
PURPOSE: Contact lens discomfort continues to be reported as the primary reason for soft lens discontinuation, regardless of new modalities and materials. The purpose of this analysis of comfort related data from a series of clinical studies was to review whether there was a difference between symptomatic and asymptomatic habitual lens wearers' comfort responses over the course of the day. METHODS: Data from five independent non-dispensing clinical studies were pooled and analysed...
November 2016: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27767354/long-term-efficacy-of-orthokeratology-contact-lens-wear-in-controlling-the-progression-of-childhood-myopia
#12
Jacinto Santodomingo-Rubido, César Villa-Collar, Bernard Gilmartin, Ramón Gutiérrez-Ortega, Keiji Sugimoto
PURPOSE: The primary outcome of this study is to compare the axial length growth of white European myopic children wearing orthokeratology contact lenses (OK) to a control group (CT) over a 7-year period. METHODS: Subjects 6-12 years of age with myopia -0.75 to -4.00DS and astigmatism ≤1.00DC were prospectively allocated OK or distance single-vision spectacles (SV) correction. Measurements of axial length (Zeiss IOLMaster), corneal topography, and cycloplegic refraction were taken at 6-month intervals over a 2-year period...
October 21, 2016: Current Eye Research
https://www.readbyqxmd.com/read/27755286/multicenter-testing-of-a-risk-assessment-survey-for-soft-contact-lens-wearers-with-adverse-events-a-contact-lens-assessment-in-youth-study
#13
Luigina Sorbara, Aaron B Zimmerman, G Lynn Mitchell, Kathryn Richdale, Dawn Y Lam, Beth T Kinoshita, Robin L Chalmers, Heidi Wagner
PURPOSE: To test the ability of responses to the Contact Lens Assessment in Youth (CLAY) Contact Lens Risk Survey (CLRS) to differentiate behaviors among participants with serious and significant (S&S) contact lens-related corneal inflammatory events, those with other events (non-S&S), and healthy controls matched for age, gender, and soft contact lens (SCL) wear frequency. METHODS: The CLRS was self-administered electronically to SCL wearers presenting for acute clinical care at 11 clinical sites...
October 13, 2016: Eye & Contact Lens
https://www.readbyqxmd.com/read/27748699/power-profiles-of-commercial-multifocal-soft-contact-lenses
#14
Eon Kim, Ravi C Bakaraju, Klaus Ehrmann
PURPOSE: To evaluate the optical power profiles of commercially available soft multifocal contact lenses and compare their optical designs. METHODS: The power profiles of 38 types of multifocal contact lenses-three lenses each-were measured in powers +6D, +3D, +1D, -1D, -3D, and -6D using NIMO TR1504 (Lambda-X, Belgium). All lenses were measured in phosphate buffered saline across 8 mm optic zone diameter. Refractive index of each lens material was measured using CLR 12-70 (Index Instruments, UK), which was used for converting measured power in the medium to in-air radial power profiles...
September 29, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27748361/fabricating-customized-hydrogel-contact-lens
#15
Andre Childs, Hao Li, Daniella M Lewittes, Biqin Dong, Wenzhong Liu, Xiao Shu, Cheng Sun, Hao F Zhang
Contact lenses are increasingly used in laboratories for in vivo animal retinal imaging and pre-clinical studies. The lens shapes often need modification to optimally fit corneas of individual test subjects. However, the choices from commercially available contact lenses are rather limited. Here, we report a flexible method to fabricate customized hydrogel contact lenses. We showed that the fabricated hydrogel is highly transparent, with refractive indices ranging from 1.42 to 1.45 in the spectra range from 400 nm to 800 nm...
October 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27737459/friction-measurements-on-contact-lenses-in-a-physiologically-relevant-environment-effect-of-testing-conditions-on-friction
#16
Olof Sterner, Rudolf Aeschlimann, Stefan Zürcher, Kathrine Osborn Lorenz, Joseph Kakkassery, Nicholas D Spencer, Samuele G P Tosatti
Purpose: To characterize the effect of lubricant composition and in vitro ageing on the coefficient of friction (CoF) of a wide range of commercially available soft contact lenses (SCLs). Methods: The CoF of SCLs was characterized by means of microtribometry against a mucin-coated glass disk. One reusable (RU) silicone-hydrogel (SiHy) lens, senofilcon A, and two daily disposable (DD) lenses, etafilcon A (hydrogel) and nelfilcon A (hydrogel), were tested under different lubricant solutions, including a tear-like fluid (TLF) containing proteins and lipids...
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27713659/stress-concentration-in-periodically-rough-hertzian-contact-hertz-to-soft-flat-punch-transition
#17
R Ledesma-Alonso, E Raphaël, L Léger, F Restagno, C Poulard
We report on the elastic contact between a spherical lens and a patterned substrate, composed of a hexagonal lattice of cylindrical pillars. The stress field and the size of the contact area are obtained by means of numerical methods: a superposition method of discrete pressure elements and an iterative bisection-like method. For small indentations, a transition from a Hertzian to a soft-flat-punch behaviour is observed when the surface fraction of the substrate that is covered by the pillars is increased. In particular, we present a master curve defined by two dimensionless parameters, which allows one to predict the stress at the centre of the contact region in terms of the surface fraction occupied by pillars...
September 2016: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/27668490/effects-of-lipid-supplements-on-tear-biochemistry-in-contact-lens-wearers
#18
Athira Rohit, Mark D P Willcox, Fiona Stapleton
PURPOSE: To establish the effect of lipid supplements on tear lipid biochemistry and their influence on lens wear comfort in habitual lens wearers. METHODS: Forty habitual soft contact lens wearers were recruited to a double-masked, randomized crossover trial. An emulsion drop containing phosphatidylglycerol (Systane Balance; Alcon) and a liposomal spray containing phosphatidylcholine (Tears again; BioRevive) along with saline placebos were used three times a day for 14 days with 48 hours of washout between each intervention...
October 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27646285/a-sixteen-year-survey-of-canadian-contact-lens-prescribing
#19
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
https://www.readbyqxmd.com/read/27626155/differentiation-of-mild-keratoconus-from-corneal-warpage-according-to-topographic-inferior-steepening-based-on-corneal-tomography-data
#20
Lia Florim Patrão, Ana Laura Caiado Canedo, João Luiz Peixoto Braga de Azevedo, Rosane Correa, Renato Ambrósio
We report two cases of suspicious asymmetric bow tie and inferior steepening on topographic evaluations with reflection (Placido) and projection (Scheimpflug). Rotating Scheimpflug corneal and anterior segment tomography (Oculus Pentacam HR, Wetzlar, Germany)® was performed in the first case, with a maximal keratometric value (Kmax) of 43.2 D and an overall deviation value from the Belin/Ambrósio Enhanced Ectasia Display (BAD-D) of 1.76, which was observed in the study eye (OD). BAD-D was 6.59 in the fellow eye, which had clinical findings that were consistent with keratoconus stage 2...
July 2016: Arquivos Brasileiros de Oftalmologia
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