Highlights •Levels of surface versus bulk active lysozyme deposited on several hydrogel contact lens materials were investigated. •The surface and bulk activity of lysozyme deposited on contact lenses is material dependent. •Lysozyme on Group IV lens materials such as etafilcon...
SIGNIFICANCE This cross-sectional study presented a link between contact lens wear and changes on the cellular morphology characteristics of the lid wiper (LW) epithelium, which was not visible by LW staining. PURPOSE The aim of this study was to establish if the...
Highlights •3-month study of the effects of an H2O2 vs. PHMB MPS lens care on eyelid tissue.. •Greater reduction in lid hyperaemia and papillae H2O2 vs PHMB MPS lens care. •No improvements in eyelid margin staining with either system. •An H2O2-based lens...
SIGNIFICANCE The effectiveness of multifocal contact lenses (MFCLs) at slowing myopia progression may hinge on the accommodative behavior of young eyes fit with these presbyopic style lenses. Can they remove hyperopic defocus? Convergence accommodation as well as pupil size and the...
Abstract: With the increasing incidence of more pathogens that can cause microbial keratitis (MK), it is necessary to periodically reassess disinfection multipurpose solutions testing requirements to ensure that relevant organisms to challenge them are being used. Current testing protocols have included...
Purpose To characterise the impact of monofocal soft contact lens (SCL) and bifocal SCLs on refractive error, depth of focus (DoF) and orientation of blur in the peripheral visual field. Methods Monofocal and two bifocal SCLs, Acuvue Bifocal (AVB, Johnson...
Purpose To review the published literature to assess the visual outcomes and adverse events associated with the 2 most commonly used contact lenses for treating aphakia in children: silicone elastomer (SE) and rigid gas permeable (RGP). Methods Literature searches were...
Abstract Purpose: To investigate the correlation between the changes in the ocular surface temperature (OST) and tear film stability over soft contact lenses (SCLs). Methods: We enrolled 20 eyes of 20 normal SCL wearers (20 men; 24.4 ± 4.1 years). We used...
Objectives: Cosmetic contact lenses are increasingly popular because of their eye enhancing cosmetic benefits. The pigment particles used in these lenses can impact lens surface characteristics. This article examines the surface characteristics and the differences between the clear and the pigmented regions among...
Tradotto e adattato da Review of Contact Lens–Related Complications Punti chiave La finalità di questo articolo di revisione è riassumere le complicanze associate all’utilizzo di lenti a contatto più frequentemente incontrate nella pratica clinica. Gli autori riportano inoltre alcuni principi di...
Objective: Long-term follow-up of contact lens (CL) wearers leads to better understanding of the factors leading to changes in CL trends. This study is an attempt to ascertain these factors in an emerging market like India. Factors like occupation were analyzed...
Objectives: To assess contact lens preservative uptake and release from multipurpose solutions (MPS) and subsequent acquisition of lens antibacterial activity. Methods: Kinetics of uptake and release of poly (hexamethylene biguanide hydrochloride) (PHMB) or polyquaternium-1 (PQ-1) from various contact lenses were studied initially...
Objectives: The outermost surface composition of 11 silicone hydrogel (SiHy) lenses was measured using X-ray photoelectron spectroscopy (XPS) to understand differences in wettability and potential interactions within an ocular environment. The SiHy lenses tested included balafilcon A, lotrafilcon A, lotrafilcon...
Objective: The study aimed to compare the visual performance of contact lenses with and without negative spherical aberration (SA) over 5 days of wear. Methods: At baseline, 32 myopic participants (aged 18–33 years) were fitted in a randomized order with two lenses...
Abstract Purpose To compare the visual performance of prototype contact lenses designed via deliberate manipulation of higher-order spherical aberrations to extend-depth-of-focus with two commercial multifocals, after 1 week of lens wear. Methods In a prospective, participant-masked, cross-over, randomized, 1-week dispensing...
Abstract Purpose To compare the computed optical performance of prototype lenses designed using deliberate manipulation of higher-order spherical aberrations to extend depth-of-focus (EDOF) with two commercial multifocals. Methods Emmetropic, presbyopic, schematic eyes were coupled with prototype EDOF and commercial multifocal...
Abstract Purpose Multifocal or multi-zone contact lenses are increasingly being fit to young eyes in an attempt to control myopia progression. However, success in achieving this aim may depend on how much the eye accommodates. The purpose of the current...
SIGNIFICANCE When fit with monovision, most early presbyopes (aged 40 to 50 years) accommodated to near objects by focusing the distance corrected eye, leaving the near corrected eye myopically defocused with reduced image quality. A few were able to switch...
Highlights The study aimed to determine the impact of the multifocal design on discontinuation rates. Reasons for discontinuation and psychosocial factors were studied. Centre near spherical multifocal design had a higher discontinuation rate. Most common cause for discontinuation was poor...
Highlights •LipidTOX (a novel lipophilic dye) can stain lipid deposits on contact lens surfaces. •Surface area of the deposits can be analyzed using the described procedure. •Lipid deposition on various commercial contact lens materials is not significantly different at the...
Highlights Effect of lens wearing modality on changes in ocular surface physiology and comfort was studied. Conjunctival redness, conjunctival and corneal staining increased after two months of lens wear. Changes in ocular surface physiology were similar with daily and monthly...
Highlights Multifocal contact lens designs may have got some limitations on wearers’ visual function quality, inducing ghosting, halos, visual fluctuation. A neural adaptation is necessary for an optimal visual performance with multifocal contact lens. Using a yellow filter could increase...
Objective: To investigate whether initial assessment of contact lenses prescribed for myopia control (MC) predicts short-term visual performance. Method: Retrospective analysis of 43 participants in a double-masked, randomized, cross-over trial wearing at least one lens: single-vision (SV) lens (1-DAY ACUVUE...
Highlights •A clinical comparison of lid wiper staining between different types of lissamine green impregnated strips was performed. •Within subject measurements of lid wiper staining do not significantly differ from day to day. •Lid evertion increased lid wiper staining but...
Abstract Background and Objective: To investigate changes in ocular surface inflammatory markers after daily and overnight silicone hydrogel contact lens wear in healthy wearers. Material and Methods: Twenty-six experienced soft contact lens subjects were evaluated at baseline, after 1-day of silicone hydrogel...
Purpose: To describe our experience treating a cohort of unilateral aphakic infants with contact lenses in the Infant Aphakia Treatment Study (IATS). Materials and methods: Fifty-seven of the 114 infants in the IATS were randomized to contact lens wear; all were followed...
Objectives: To assess the antimicrobial effectiveness of multipurpose solutions in regard to the disinfection of silicone hydrogel contact lenses (CL) using a study of clinical bacterial isolates from ocular material. Methods: Three multipurpose solutions (solution A: polyhexamethylene biguanide 0.00025 g/100...
Objectives: To compare visual performance of extended depth-of-focus (EDOF) prototypes with a new, center-near, commercial, multifocal contact lens. Methods: Presbyopic participants (n=57) wore 1-Day ACUVUE MOIST MULTIFOCAL (1DAMM) and an EDOF prototype for one week in a double-masked, prospective, cross-over,...
The management of contact lens discomfort (CLD) remains a challenge in clinical practice [1]. There are more than 140 million contact lens wearers worldwide and about 50% of them report having adverse ocular sensations [1,2], generally described as ocular dryness...
Contact lenses as a means to deliver pharmaceuticals to the eye have seen a significant increase in research interest in the past few years. This review will detail the in vitro experiments which have investigated use of these contact lenses...
Scarica o visualizza INFORMATIVA LENTI A CONTATTO MORBIDE Scarica o Visualizza QUESTIONARIO RIASSUNTIVO LENTI A CONTATTO MORBIDE ...
http://iovs.arvojournals.org/article.aspx?articleid=2631064 articolo OPEN ACCESS Abstract 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)...
http://www.contactlensjournal.com/article/S1367-0484(16)30128-X/fulltext?rss=yes Abstract Purpose To assess whether short-term soft contact lens wear alters the anterior eye surface. Methods Twenty-two neophyte subjects wore soft contact lenses for a period of five hours. Topography based corneo-scleral limbal radius estimates were derived from height...
http://journals.lww.com/optvissci/Abstract/prepublication/The_Safety_of_Soft_Contact_Lenses_in_Children_.98380.aspx Articolo Open Access Purpose: There is increasing interest in fitting children with soft contact lenses. This review collates data from a range of studies to estimate the incidence of complications, specifically corneal infiltrative events and microbial keratitis, in patients...
http://journals.lww.com/optvissci/Pages/articleviewer.aspxyear=9000&issue=00000&article=98410&type=Abstract Abstract PURPOSE To determine the effect of multifocal contact lenses on accommodation and phoria in children. METHODS This was a prospective, non-dispensing, randomized, crossover, single-visit study. Myopic children with normal accommodation and binocularity and no history of myopia control...
http://journals.lww.com/claojournal/Pages/articleviewer.aspxyear=9000&issue=00000&article=99378&type=Abstract Objective: To identify modifiable risk factors contributing to Acanthamoeba keratitis (AK) infection. Methods: A case-control investigation was conducted. Case patients were soft contact lens wearers with laboratory-confirmed AK. Control were soft contact lens wearers >=12 years of age, with...
http://journals.lww.com/optvissci/Abstract/2017/04000/Inter_relationship_of_Soft_Contact_Lens_Diameter,.5.aspx ABSTRACT Purpose. To evaluate the inter-relationship of soft contact lens base curve radius (BC), diameter, and lens fit using a mathematical model. Methods. A spreadsheet mathematical model was used to evaluate theoretical fitting characteristics for various combinations of soft...
http://www.contactlensjournal.com/article/S1367-0484(16)30151-5/fulltext?rss=yes Purpose: To calculate theoretical fitting success rates (SR) for a range of typical soft contact lens (SCL) designs using a mathematical model. Method: A spreadsheet mathematical model was used to calculate fitting SR for various SCL designs. Designs were...
Controversie cliniche la super cie oculare e l’uso di lenti a contatto...
Cosa succede se si usano lenti a contatto senza assistenza professionale a porto prolungato per 3 settimane. Un caso di grave cheratite bilaterale da pseudomonas con lac acquistate su internet....
http://www.jcrsjournal.org/article/S0886-3350(16)30394-7/fulltext?rss=yes...
http://www.contactlensjournal.com/article/S1367-0484(16)30172-2/pdf...
http://journals.lww.com/optvissci/Abstract/pre-publication/Painless_Acanthamoeba_Keratitis_with_Normal.98424.aspx...
http://www.contactlensjournal.com/article/S1367-0484(16)30161-8/fulltext?rss=yes...
http://journals.lww.com/claojournal/Pages/articleviewer.aspx?year=9000&issue=00000&article=99399&type=Abstract...
http://journals.lww.com/claojournal/Abstract/publishahead/Paecilomyces_lilacinus_Keratitis_in_a_Soft_Contact.99398.aspx...
http://www.journalofoptometry.org/en/short-term-comparison-between-extended-depth-of-focus/articulo/S1888429616300085/...
http://journals.lww.com/claojournal/Abstract/2017/01000/Impact_of_Contact_Lens_Material,_Design,_and.6.aspx...
http://journals.lww.com/optvissci/Pages/articleviewer.aspx?year=9000&issue=00000&article=98413&type=Abstract...
http://journals.lww.com/optvissci/Pages/articleviewer.aspx?year=9000&issue=00000&article=98400&type=Abstract...
http://journals.lww.com/claojournal/Pages/articleviewer.aspx?year=9000&issue=00000&article=99381&type=Abstract...
Convegno SOPTI 2017 : Cheratocono, Mestre 22 e 23 Gennaio 2017 (clicca per visualizzare Convegno) Lenti a contatto Morbide e Morbide Toriche nel cheratocono, Abstract relazione di David Pietroni (visualizza CV): Lenti a contatto Morbide e Morbide Toriche nel cheratocono La compensazione ottica del cheratocono è...
I disagi visivi causati dalla presbiopia sono particolarmente disturbanti per i soggetti ipermetropi, che risentono prima e in misura più consistente della perdita di accomodazione e sono pertanto più stimolati a ricercare tutte le soluzioni possibili per ovviare alle loro...
estratto e adattato da Dry Eye Treatment Based on Contact Lens Drug Delivery: A Review Trattamento dell’occhio secco su rilascio farmacologico attraverso lente a contatto La sindrome dell’occhio secco é una disfunzione multifattoriale del film lacrimale e della superficie oculare(1),...
