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https://www.readbyqxmd.com/read/28817556/risk-behaviors-for-contact-lens-related-eye-infections-among-adults-and-adolescents-united-states-2016
#1
Jennifer R Cope, Sarah A Collier, Hannah Nethercut, Jefferson M Jones, Kirsten Yates, Jonathan S Yoder
Contact lens-related eye infections, which can lead to serious outcomes, including blindness, are associated with several risk factors, including sleeping in lenses, exposing lenses to water, not adhering to replacement schedules, and reusing disinfecting solution (1). In some studies, adolescent and young adult contact lens wearers have been reported to be more likely than older adult contact lens wearers to develop eye infections (2,3) and more likely to have poor contact lens hygiene practices (2). In 2015, CDC reported the number and demographics of adult contact lens wearers in the United States to define the population at risk for contact lens-related eye infections (4); however, this estimate did not include adolescents...
August 18, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28816867/peripheral-refraction-and-aberration-profiles-with-multifocal-lenses
#2
Cathleen Fedtke, Klaus Ehrmann, Varghese Thomas, Ravi C Bakaraju
SIGNIFICANCE: The amount of central or peripheral myopic shift, as induced by different multifocal contact lenses when viewing objects at distance or near, may provide insights on the potential efficacy for slowing eye growth. PURPOSE: The present study aims to compare peripheral refraction and higher-order aberration profiles of four multifocal contact lenses with a single vision control lens. METHODS: Thirty-five myopes (age 21.2 ± 2.1 years) completed the trial, of whom 16 wore Air Optix Aqua and Proclear Multifocal Distance and Near (group 1, spherical equivalent: -2...
August 14, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28816866/differences-in-tear-film-biochemistry-of-symptomatic-and-asymptomatic-lens-wearers
#3
Simin Masoudi, Fiona J Stapleton, Mark D P Willcox
SIGNIFICANCE: The concentration of selected proteins and inflammatory mediators in tears of symptomatic and asymptomatic contact lens wearers were quantified. The level of leukotriene B4 was higher in the symptomatic group. This may suggest that inflammation can be the cause of discomfort sensation at the end of day. PURPOSE: The present study aims to quantify the concentration of selected tear lipids and proteins in symptomatic and asymptomatic contact lens wearers...
August 14, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28816728/lipid-deposition-on-contact-lenses-when-using-contemporary-care-solutions
#4
Negar Babaei Omali, Mark Lada, Carol Lakkis, Philip B Morgan, Jason J Nichols, Lakshman N Subbaraman, Lyndon W Jones
SIGNIFICANCE: There remains only a small amount of data from human studies demonstrating the effect of contact lens/lens care solution combinations on the deposition of lipids. Therefore, information on the degree to which modern materials deposit lipids when used with contemporary care solutions would be valuable. PURPOSE: The present study aims to determine the effect of lens care system combinations on levels of total lipid, cholesterol, and cholesteryl esters extracted from three different contact lenses (CLs) when used with four contemporary care systems...
August 16, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28816727/effect-of-time-on-scleral-lens-settling-and-change-in-corneal-clearance
#5
Heinz Otchere, Lyndon W Jones, Luigina Sorbara
SIGNIFICANCE: With the increase in the use of scleral contact lenses among practitioners, questions regarding lens settling are gradually gaining attention. This is because current studies support the notion that scleral lenses settle back over time. More research is needed to understand the exact cause and the factors that underpin such phenomenon. PURPOSE: The present study aims to assess the effect of time on topographic corneal clearance of three scleral contact lenses of varying sagittal depths...
August 16, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28811794/comparing-the-effects-of-two-different-contact-lenses-on-corneal-re-epithelialization-after-corneal-collagen-cross-linking
#6
Yusuf Kocluk, Savas Cetinkaya, Emine Alyamac Sukgen, Murat Günay, Alper Mete
OBJECTIVE: To investigate whether keratoconus (KC) patients who applied the corneal collagen cross-linking (CXL) and two different contact lens (CL) showed any differences in complaints and findings following the CXL. METHODS: This prospective, comparative, double-blind clinical study involved 60 eyes of 60 patients (38 female and 22 male). At the end of the CXL procedure, CL (Balafilcon A) was inserted in 29 patients (Group-1) while CL with different material content (Hioxifilcon A) designed for therapeutic/bandage purposes were inserted in 31 patients (Group-2)...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28810578/25g-compared-with-20g-vitrectomy-under-resight-non-contact-wide-angle-lenses-for-terson-syndrome
#7
Xinbang Mao, Zhipeng You
The aim of the present study was to compare the effectiveness of 25G vitrectomy to standard 20G vitrectomy for treatment of Terson syndrome under Resight non-contact wide-angle lenses. This was a case-control study of 20 patients with Terson syndrome (study group) that underwent 25G vitrectomy under Resight non-contact wide-angle lenses, with those of 20 matched patients that underwent 20G vitrectomy (control group). Medical records were reviewed from between July 2011 and October 2013. Data included results of the Early Treatment Diabetic Retinopathy Study examination, ophthalmology B-scan ultrasonography and fundus photography...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28804933/chemical-functionalization-of-polysaccharides-towards-biocompatible-hydrogels-for-biomedical-applications
#8
Andreas Kirschning, Gerald Dräger, Nick Dibbert
Hydrogels have emerged as a highly interdisciplinary topic as they play a significant role for a vast number of applications. They have been studied extensively as materials for contact lenses, wound dressing and as filler material in soft-tissue augmentation, in which classical polymer backbones such as hydroxyethylmethacrylate (HEMA) are typically employed. More recently, polysaccharides have received attention, particularly in the fields of regenerative medicine and tissue engineering, as ideal candidate materials for artificial extracellular matrices (ECM)...
August 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28799960/critical-contact-lens-oxygen-transmissibility-and-tear-lens-oxygen-tension-to-preclude-corneal-neovascularization
#9
Karen K Yeung, Helen J Yang, Andrew L Nguyen, Barry A Weissman
OBJECTIVE: The purpose of this study is to determine the peripheral oxygen transmissibility (pDk/t) and respective central oxygen transmissibility (cDk/t) in soft contact lenses (SCLs) which might preclude SCL-driven corneal neovascularization (NV) in healthy myopic SCL users. METHODS: Twenty subjectively successful SCL-wearing patients who presented with asymptomatic but active peripheral corneal NV (not ghost vessels) were recruited as study patients. Twenty-one patients who did not have NV were similarly recruited as controls...
August 9, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28799525/fast-light-induced-reversible-wettability-of-zinc-oxide-nanorod-array-coated-with-gold-thin-layer
#10
Yuefan Wei, Hejun Du, Junhua Kong, Van Thai Tran, Jia Kai Koh, Chenyang Zhao, Chaobin He
Zinc oxide (ZnO) has gained much attention nowadays due to its excellent physical and chemical properties, and been extensively studied in energy harvesting applications, such as photovoltaic and piezoelectric devices. In recent years, its reversible wettability has also been attracting increasing interests. The wettability of ZnO nanostructures with various morphologies was studied. However, to our best knowledge, there is still a lack of investigations on further modifications on ZnO to provide more benefits outweighed to pristine ZnO...
August 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28773992/influence-of-amphibian-antimicrobial-peptides-and-short-lipopeptides-on-bacterial-biofilms-formed-on-contact-lenses
#11
Magdalena Maciejewska, Marta Bauer, Damian Neubauer, Wojciech Kamysz, Malgorzata Dawgul
The widespread use of contact lenses is associated with several complications, including ocular biofilm-related infections. They are very difficult to manage with standard antimicrobial therapies, because bacterial growth in a biofilm is associated with an increased antibiotic resistance. The principal aim of this study was to evaluate the efficacy of antimicrobial peptides (AMPs) in eradication of bacterial biofilms formed on commercially available contact lenses. AMPs were synthesized according to Fmoc/tBu chemistry using the solid-phase method...
October 26, 2016: Materials
https://www.readbyqxmd.com/read/28771841/disturbing-the-balance-effect-of-contact-lens-use-on-the-ocular-proteome-and-microbiome
#12
REVIEW
Maureen Boost, Pauline Cho, Zhaoran Wang
Contact lens wear is a popular, convenient and effective method for vision correction. In recent years, contact lens practice has expanded to include new paradigms, including orthokeratology; however, their use is not entirely without risk, as the incidence of infection has consistently been reported to be higher in contact lens wearers. The explanations for this increased susceptibility have largely focused on physical damage, especially to the cornea, due to a combination of hypoxia, mechanical trauma, deposits and solution cytotoxicity, as well as poor compliance with care routines leading to introduction of pathogens into the ocular environment...
August 3, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28765993/effects-of-acute-peripheral-central-visual-field-loss-on-standing-balance
#13
Caitlin O'Connell, Arash Mahboobin, Scott Drexler, Mark S Redfern, Subashan Perera, Amy C Nau, Rakié Cham
Vision impairments such as age-related macular degeneration (AMD) and glaucoma are among the top risk factors for geriatric falls and falls-related injuries. AMD and glaucoma lead to loss of the central and peripheral visual fields, respectively. This study utilized a custom contact lens model to occlude the peripheral or central visual fields in healthy adults, offering a novel within-subject approach to improve our understanding of the etiology of balance impairments that may lead to an increased fall risk in patients with visual field loss...
August 1, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28761479/surveillance-and-molecular-identification-of-acanthamoeba-and-naegleria-species-in-two-swimming-pools-in-alexandria-university-egypt
#14
Ahmad Z Al-Herrawy, Mahmoud I Khalil, Soheir S El-Sherif, Fatima A E Omar, Wael M Lotfy
BACKGROUND: Swimming in contaminated water was reported to be associated with Acanthamoeba and N. fowleri human infections. The present study was carried out with the aim of isolation and identification of the different species of Acanthamoeba and Naegleria from two swimming pools in Alexandria University. METHODS: Samples were collected from the swimming pools of Alexandria University Stadium and Faculty of Agriculture-Alexandria University during the period from May 2012 to April 2013...
April 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28752898/contact-lenses-to-slow-progression-of-myopia
#15
REVIEW
Padmaja Sankaridurg
The prevalence of myopia has been steadily rising, with 28 per cent of the global population said to be affected in 2010 and to rise to affect nearly 50 per cent by 2050. Increasing levels of myopia increase the risk of vision impairment and in particular, high myopia is associated with the risk of serious and permanent visual disability due to associated sight-threatening complications. To stem the burden associated with higher levels of myopia, there are efforts to slow the progression of myopia, and several optical and pharmaceutical strategies have been found useful in slowing myopia to varying degrees...
July 28, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28751981/characterization-of-soft-contact-lens-fitting-using-ultra-long-scan-depth-optical-coherence-tomography
#16
Lele Cui, Ming Li, Meixiao Shen, Fan Lu, Jianhua Wang
OBJECTIVES: To evaluate the centration and movement of soft contact lenses and to verify the repeatability of two repeated measurements of the lens centration and movement using ultra-long scan depth optical coherence tomography (UL-OCT). METHODS: A 1-day Acuvue® Define™ lens was tested on both eyes of 10 subjects (5 males and 5 females; mean age, 31.6 years). The centration and blink-induced movement of the contact lens were measured using UL-OCT at 5 min and 30 min after insertion...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28749897/role-of-scleral-contact-lenses-in-management-of-coexisting-keratoconus-and-stevens-johnson-syndrome
#17
Varsha M Rathi, Mukesh Taneja, Srikanth Dumpati, Preeji S Mandathara, Virender S Sangwan
PURPOSE: To report the rare coexistence of keratoconus and Stevens-Johnson syndrome (SJS) managed with scleral contact lenses (ScCLs). METHODS: This is a retrospective case series. Five patients (9 eyes) who had coexisting SJS and corneal ectasia were identified from the database during the 2-year period. Diagnosis of SJS was based on a positive history of drug reactions, signs of ocular surface disease, and the presence of keratinization of lid margins. Keratoconus was diagnosed by slit-lamp biomicroscopy...
July 26, 2017: Cornea
https://www.readbyqxmd.com/read/28749896/elimination-of-anterior-corneal-steepening-with-descemet-membrane-endothelial-keratoplasty-in-a-patient-with-fuchs-dystrophy-and-keratoconus-implications-for-iol-calculation
#18
Reena Gupta, Ruta Kinderyte, Deborah S Jacobs, Ula V Jurkunas
PURPOSE: To report a case of coexistent Fuchs endothelial corneal dystrophy (FECD) and keratoconus (KCN) in which there was normalization of corneal topography after Descemet membrane endothelial keratoplasty (DMEK). METHODS: Retrospective medical record review. RESULTS: Preoperative findings revealed a best-corrected visual acuity of 20/40 with -1.00 - 2.50 × 147, topographic maximum keratometry of 50.8 D with inferior steeping, and confluent guttae in the left eye...
July 26, 2017: Cornea
https://www.readbyqxmd.com/read/28747368/fusarium-keratitis-in-germany
#19
Grit Walther, Serena Stasch, Kerstin Kaerger, Axel Hamprecht, Mathias Roth, Oliver A Cornely, Gerd Geerling, Colin R Mackenzie, Oliver Kurzai, Marie von Lilienfeld-Toal
Fusarium keratitis is a destructive eye infection that is difficult to treat and which results in poor outcome. In the tropical and subtropical areas the infection is relatively common and associated with trauma or chronic eye diseases. However, in recent years, an increased incidence has been reported in temperate climate regions. At the German National Reference Center, we observed a steady increase in case numbers since 2014. Here, we present the first German case series of eye infections with Fusarium spp...
July 26, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28742623/prediction-of-orthokeratology-lens-decentration-with-corneal-elevation
#20
Zhi Chen, Feng Xue, Jiaqi Zhou, Xiaomei Qu, Xingtao Zhou
SIGNIFICANCE: Lens decentration is common and unavoidable to some extent during ortho-k treatment. By using a simplified method, we are able to predict the magnitude and direction of ortho-k lens decentration, which provides useful insights in screening for ideal ortho-k candidates and to make a quick decision when decentration happens. PURPOSE: The aim of this study was to investigate the influence of corneal elevation asymmetry on ortho-k lens decentration. METHODS: Thirty-six eyes of 36 subjects were fitted with four-curve reverse geometry ortho-k contact lenses...
July 24, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
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