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Wyświetlanie 1-10 z 10
Tytuł:
Analysis of Polish eye care professionals opinions about deposits on contact lenses
Analiza opinii polskich specjalistów ochrony wzroku dotyczących osadów na soczewkach kontaktowych
Autorzy:
Suliński, Tomasz
Pniewski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2046658.pdf
Data publikacji:
2021-11-30
Wydawca:
Medical Education
Tematy:
contact lenses
contact lens deposits
silicone-hydrogel contact lenses
contact lens discomfort
soczewki kontaktowe
osady na soczewkach kontaktowych
soczewki silikonowo-hydrożelowe
dyskomfort w soczewkach kontaktowych
Opis:
Soft contact lenses are used worldwide to correct ametropia. This medical device should be fitted and systematically evaluated on the patient eye by eye care professionals. The examination should include an evaluation of lens deposits. The widespread use of silicone hydrogel (Si-Hy) lenses and their tendency to build up lipid deposits indicate that eye care professionals should pay special attention to this kind of deposits. This paper aims to analyze the opinions of Polish ECPs regarding deposits on contact lenses, particularly regarding lipids and Si-Hy lenses. Data were collected from 103 Polish eye care professionals through an online survey. Respondents reported that lipid deposits are most often present on Si-Hy lenses, and protein deposits occur most often on hydrogel lenses. Almost all of them declare that they evaluate deposits on contact lenses on follow-up visits, which concludes that this is an essential part of the lens selection process for them. Respondents believe that different lenses and lens care solutions vary in the context of their interaction with lipid deposits. These parameters should be considered at the time of product selection. Eye care professionals expect descriptions of lenses’ resistance to lipid deposits, and care solution effectiveness in reducing lipid deposits.
Miękkie soczewki kontaktowe służące do korekcji ametropii są powszechnie używane na całym świecie. Jako wyrób medyczny powinny być dopasowywane i systematycznie oceniane na oku pacjenta przez specjalistów ochrony wzroku. Badanie kontrolne powinno obejmować ocenę osadów na soczewkach. Powszechne stosowanie soczewek silikonowo-hydrożelowych (Si-Hy) i ich tendencja do odkładania się złogów lipidowych wskazują, że specjaliści ochrony wzroku powinni zwracać szczególną uwagę na ten rodzaj osadów. Celem niniejszej pracy jest analiza opinii polskich specjalistów ochrony wzroku w zakresie osadów na soczewkach kontaktowych, ze szczególnym uwzględnieniem lipidów i soczewek Si-Hy. Dane zebrano od 103 polskich specjalistów ochrony wzroku poprzez ankietę internetową. Respondenci wskazali, że osady lipidowe najczęściej występują na soczewkach Si-Hy, a osady białkowe na soczewkach hydrożelowych. Niemal wszyscy ankietowani deklarują, że oceniają osady na soczewkach kontaktowych podczas wizyt kontrolnych, co pozwala wnioskować, iż jest to dla nich istotna część procesu doboru soczewek. Respondenci uważają, że poszczególne soczewki i płyny do ich pielęgnacji różnią się w kontekście ich interakcji z osadami lipidowymi. Parametry te powinny być brane pod uwagę w momencie wyboru produktu dla pacjenta. Specjaliści ochrony wzroku oczekują opisów odporności soczewek na powstawanie osadów lipidowych oraz skuteczności płynów pielęgnacyjnych w redukcji osadów lipidowych.
Źródło:
OphthaTherapy; 2021, 8, 4; 255-262
2353-7175
2543-9987
Pojawia się w:
OphthaTherapy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of silicone hydrogel contact lenses with lipids – a chronological review
Autorzy:
Suliński, Tomasz
Pniewski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1928016.pdf
Data publikacji:
2020
Wydawca:
Medical Education
Tematy:
contact lens deposits
contact lens discomfort
contact lenses
silicone hydrogel contact lenses
Opis:
Silicone hydrogel (SiHy) contact lenses are a common form of correction of refractive errors prescribed by eye care professionals around the world. SiHy lenses perform in a complex environment, which is the surface of the eye and the tear film. Therefore, they are exposed to various factors, such as lipid deposits. The aims of this paper are to review available scientific reports on the study of SiHy lens interactions with lipids and search for further research objectives. A total of 57 publications were identified and reviewed, from 2003 to 2020. In general, SiHy lenses are more likely to accumulate lipid deposits than traditional hydrogel lenses, although there are significant differences between SiHy lens materials that may result from different methods used in the studies. The review includes studies on various aspects of interactions between lenses and lipids, such as those concerning the effectiveness of lipids removal from lenses by care solutions. The conclusion points out future research directions, such as measurements of lipid diffusion in SiHy lens' matrices.
Źródło:
OphthaTherapy; 2020, 7, 4; 306-325
2353-7175
2543-9987
Pojawia się w:
OphthaTherapy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry eye syndrome triggered by wearing gas permable contact lens in keratoconus
Autorzy:
Stanienda-Sokół, Karolina
Wysocka-Kosmulska, Marzena
Słoka, Jakub
Łach-Wojnarowicz, Olga
Dobrowolski, Dariusz
Wylęgała, Edward
Powiązania:
https://bibliotekanauki.pl/articles/2046700.pdf
Data publikacji:
2022-03-04
Wydawca:
Medical Education
Tematy:
dry eye disease
keratoconus
gas permable contact lens
corneal punctate epithelial erosions
tear film break-up time
Opis:
A 48-year-old woman suffering from keratoconus of both eyes sought medical attention at the ophthalmology clinic with her left eye having been painful for prior 3 weeks, as well as increased sensitivity to light, foreign body sensation, stinging and watering eye. Her left eye was diagnosed with the dry eye syndrome, in addition to being treated with gas permable contact lens. Physical examination revealed corneal punctate epithelial erosions that stained positively with fluorescein in the left eye. The patient was ultimately diagnosed with dry eye disease of the left eye caused by gas permable contact lens usage.
Źródło:
OphthaTherapy; 2022, 9, 1; 29-34
2353-7175
2543-9987
Pojawia się w:
OphthaTherapy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
50 years of Soft Contact Lenses: Life and Impact of Prof. Otto Wichterle
50 lat miękkich soczewek kontaktowych. Życie i dorobek profesora Ottona Wichterlego
Autorzy:
SCHOLTZ, SIBYLLE K.
AUFFARTH, GERD U.
Powiązania:
https://bibliotekanauki.pl/articles/530693.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Historii Filozofii i Medycyny
Tematy:
Contact Lens
History of Chemistry
Soft Contact Lens
Wichterle
soczewka kontaktowa
historia chemii
miękka soczewka kontaktowa
Otto Wichterle
Opis:
Prof. Otto Wichterle was one of the pioneers of modern soft contact lens industry; his work has made a significant impact on the ophthalmic world. 50 years ago, in 1961, Otto Wichterle produced the first soft contact lenses in his own kitchen by spin cast technique using a childrens mechanical kit Merkur and dynamo for bicycles. The same year he submitted a patent for HEMA (Hydroxy- ethylmethacrylate). Today, as a result of his fundamen- tal research millions of people around the world enjoy comfortable vision with soft contact lenses. Even after using modern Refractive Surgery techniques to improve vision, Contact Lenses are still important for people with refractive errors. They are necessary and helpful when dealing with Refractive Surgery complications (e.g. com- plications with the cut and irregularities of the cornea). In interactive discussions of treating remaining refractive errors after Refractive Surgery contact lenses will be one possible comfortable solution. Wichterle’s invention of the hydrophilic material HEMA (Hydroxyethylmethacrylate) is not only used for manufacturing soft, hydrophilic contact lenses, which he invented too, but can also be used for producing hydrophilic intraocular lenses. Wichterles inventions have changed the ophthalmic world fundamentally — in only 50 years!
Profesor Otto Wichterle był jednym z pionierów nowoczesnego przemysłu miękkich soczewek kontaktowych; jego praca wywarła ogromny wpływ na rozwój okulistyki. 50 lat temu, w 1961 roku, Otto Wichterle wyprodukował pierwsze miękkie soczewki kontaktowe w swojej kuchni, stosując technologię „spin cast” przy pomocy mechanicznych zestawów dla dzieci Merkur i dynama rowerowego. Tego samego roku złożył wniosek patentowy na HEMA (metakrylan hydroksyetylu). Obecnie w wyniku jego prac badawczych miliony ludzi na całym świecie korzystają z wyższego komfortu życia dzięki miękkim soczewkom kontaktowym. Nawet w czasach gdy dostępne są nowoczesne metody chirurgicznej korekcji wad wzroku, soczewki kontaktowe mają duże znaczenie dla osób z takimi wadami. Są one niezbędne w postępowaniu przy powikłaniach po chirurgicznych zabiegach refrakcyjnych (tj. zabiegach związanych z cięciem rogówki). Ponadto stosowane są w korygowaniu wad wzroku pozostałych po zabiegach refrakcyjnych. Hydro filny materiał HEMA (metakrylan hydroksyetylu) wynaleziony przez Wichterlego jest używany nie tylko do produkcji miękkich hydrofilnych soczewek kontaktowych, ale również do produkcji hydrofilnych soczewek wewnątrzgałkowych. Wynalazki Wichterlego zmieniły gruntownie świat okulistyki w zaledwie 50 lat.
Źródło:
Archiwum Historii i Filozofii Medycyny; 2012, 75/1; 127-130
0860-1844
Pojawia się w:
Archiwum Historii i Filozofii Medycyny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of sodium hyaluronate on dehydration and water distribution in soft contact lenses
Autorzy:
Rajchel, D.
Krysztofiak, K.
Szyczewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/174392.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
contact lens dehydration
sodium hyaluronate
gravimetry
differential scanning calorimetry (DSC)
Opis:
The purpose of this investigation was to examine the influence of sodium hyaluronate (HA) solution on contact lens dehydration and the distribution of water in lens materials. These parameters were measured with gravimetry and differential scanning calorimetry. Five commercial soft contact lenses were used. They represented four FDA (Federal Drug Administration) groups: Air Optix Night&Day Aqua and Acuvue Oasys (I FDA group), Proclear 1-Day (II FDA group), PureVision (III FDA group) and 1-Day Acuvue Moist (IV FDA group). All materials were investigated with two preservative-free HA solutions 0.1% and 0.3%. HA solutions influenced the water content and the dehydration rate of some examined lenses. For three lenses (Oasys, Proclear, Moist) water content of HA lenses was greater than control. Significant slowdown of dehydration rate under HA during the first 20min was observed only for Proclear. PhaseI of dehydration increased significantly with HA solutions in case of Moist and Proclear. For Night&Day and Oasys phaseI appeared under HA solution while it was not present for control lenses. Duration of the phaseI was strongly correlated with water content of the lenses (R2=0.844). The amount of freezable and non-freezable water depended strongly on characteristics of lens material and its interaction with HA molecules. Proclear seems to be the most prone to attach HA molecules which affect changes in dehydration characteristics and water behavior in the polymer. PureVision might be considered as the most resistant to HA in terms of dehydration dynamics and water distribution. All measured parameters seem to be dependent more on material properties than HA concentration.
Źródło:
Optica Applicata; 2016, 46, 3; 483-496
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of in vitro effect of selected contact lens solutions conjugated with nanoparticles in terms of preventive approach to public health risk generated by Acanthamoeba strains
Autorzy:
Padzik, M.
Hendiger, E.B.
Żochowska, A.
Szczepaniak, J.
Baltaza, W.
Pietruczuk-Padzik, A.
Olędzka, G.
Chomicz, L.
Powiązania:
https://bibliotekanauki.pl/articles/2082951.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
Acanthamoeba keratitis
contact lens solutions
silver/gold nanoparticles
Acanthamoeba trophozoites
anti-amoebic in
vitro effect
Opis:
Introduction. Various Acanthamoeba species are free-living organisms widely distributed in the human environment. Amphizoic amoebae as facultative parasites may cause vision-threatening eye disease – Acanthamoeba keratitis, mostly among contact lens wearers. As the number of cases is increasing, and applied therapy often unsuccessful, proper hygienic measures and effective contact lenses disinfection are crucial for the prevention of this disease. Available contact lens solutions are not fully effective against amphizoic amoebae; there is a need to enhance their disinfecting activity to prevent amoebic infections. The use of developing nanotechnology methods already applied with success in the prevention, diagnostic and therapy of other infectious diseases might be helpful regarding amoebic keratitis. This study assesses the in vitro effect of selected contact lens solutions conjugated with nanoparticles against Acanthamoeba trophozoites. Materials and method. Three selected contact lens solutions conjugated with silver and gold nanoparticles in concentration of 0.25–2.5 ppm were used in vitro against the axenically cultured ATCC 30010 type Acanthamoeba castellanii strain. The anti-amoebic efficacy was examined based on the oxido-reduction of AlamarBlue. The cytotoxicity tests based on the measurement of lactate dehydrogenase (LDH) activity were performed using a fibroblast HS-5 cell line. Results. Enhancement of the anti-amoebic activity of contact lens solutions conjugated with selected nanoparticles expressed in the dose dependent amoebic growth inhibition with a low cytotoxicity profile was observed. Conclusions. Results of the study showed that conjugation of selected contact lens solutions with silver nanoparticles might be a promising approach to prevent Acanthamoeba keratitis among contact lens users.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 1; 198-202
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Daily disposable contact lenses as a platform for ocular drug delivery of cyclosporine A
Autorzy:
Michałkiewicz, Ola
Nowak, Iwona
Nowak, Rafał
Rykowska, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/24085732.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
contact lens
cyclosporine A
vitamin E
drug delivery systems
dry eye syndrome
Opis:
Ophthalmic drug delivery is an important area of research that aims to improve the efficacy and convenience of treatment for various eye conditions. There are multiple ways in which drugs can be delivered to the eye, including eye drops, ointments, gels, and inserts. The most prevalent way of administering medication to the eye is through eye drops. They are easy to use and can be self-administered by patients. Nonetheless, eye drops have the disadvantage of being prone to removal by tears, which may result in insufficient drug absorption and reduced effectiveness. Irregular use of active substances can exacerbate the disease, resulting in prolonged treatment with questionable efficacy. Soft contact lenses that serve as ophthalmic drug delivery systems (DDS) can become a viable substitute for traditional treatments. These polymeric lenses can be embedded with various active compounds, some of which are not readily soluble in water or physiological fluids. One such drug is Cyclosporine A (CyA), an immunosuppressant with a high molecular weight and hydrophobic properties, chronically used to treat dry eye syndrome (DES). The article discusses the development of a method for modifying Hilafilcon B contact lenses obtained from drugstores with Cyclosporine A (CyA). The drug was administered to the lenses using an immersion technique, and the process parameters were monitored to control drug release efficiency and profile. The drug release was measured in an Artificial Lacrimal Fluid (ALF) buffer, mimicking tear fluid with a pH of 7.9. The stability of CyA in this buffer was assessed. For the parameters used, the best drug application and release profile was achieved by immersing the contact lenses for 24 hours at 25°C in a CyA solution containing 20 μg/ml of the active substance and adding 5 mg/ml of Vitamin E.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 172794
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of oxygen permeability of contact lenses based on analysis of porosity
Autorzy:
Lewandowska, M.
Jasińska-Kwaśnik, W.
Jóźwik, A.
Siedlecki, D.
Powiązania:
https://bibliotekanauki.pl/articles/1190018.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
przenikalność tlenu
soczewka
porowatość
oxygen permeability
contact lens
porosity
Opis:
Oxygen permeability seems to be the most important parameter characterize the contact lens. Lenses, which permeable more oxygen to the cornea are safer, reduce the risk of infection and provide greater comfort of wearing. Oxygen permeability of contact lenses might be calculated by analysis of porosity of its surface. With using special program the size and number of pores on definite area was calculated and dependence of permeability and hydration on porosity were established.
Źródło:
Interdisciplinary Journal of Engineering Sciences; 2015, 3, 1; 1--5
2300-5874
Pojawia się w:
Interdisciplinary Journal of Engineering Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Terahertz-based system for dehydration analysis of hydrogel contact lenses
Autorzy:
Burgos-Fernández, Francisco J.
Guaus, Ester
Martínez, Cristina
Vilaseca, Meritxell
Powiązania:
https://bibliotekanauki.pl/articles/174402.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
terahertz radiation
terahertz system
hydrogel contact lens
dehydration
water content
lenscare solutions
Opis:
The use of terahertz-based techniques has grown very fast since they are capable of performing evaluations at molecular level, being very suitable for the analysis of biological samples and biomaterials such as those for contact lenses. These biomaterials are continuously evolving to enhance the lens wearer’s comfort by improving their hydration state and surface wettability. Therefore, this study examines a novel terahertz system for the assessment of the temporary in vitro dehydration of hydrogel contact lenses, which provides a new index to assess their state of hydration. Several conventional and silicone hydrogel contact lenses and lens care solutions were analysed. Traditional methods such as the gravimetric determination of water content and the measurement of the static contact angle were also carried out for the validation of the developed system. The dehydration rate measurements of contact lenses obtained with the proposed system correlated with the values provided by traditional methods. As a whole, conventional hydrogel contact lenses exhibited the lowest values for dehydration rate. The tests conducted on various solutions showed a correlation between the wetting action of the solution and the dehydration rate of the contact lens material.
Źródło:
Optica Applicata; 2019, 49, 4; 571-584
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kontaktologia w dobie koronawirusa
Contact lens practice in the times of coronavirus
Autorzy:
Ambroziak, Anna M.
Powiązania:
https://bibliotekanauki.pl/articles/1927953.pdf
Data publikacji:
2020-06-30
Wydawca:
Medical Education
Tematy:
COVID-19
SARS-CoV-2
contact lens practice
contact lenses
soczewki kontaktowe
praktyka kontaktologiczna
Opis:
Wysoce zakaźny wirus SARS-CoV-2, który może powodować ciężką chorobę układu oddechowego znaną jako COVID-19, jest obecnie krytycznym wyzwaniem dla praktyki kontaktologicznej: optometrycznej i okulistycznej. Pandemia ewoluuje, a jej wpływ na zdrowie publiczne jest znaczący oraz progresywny i będzie skutkować ogromnymi zmianami gospodarczymi i społecznymi. W czasach koronawirusa praktyka kontaktologiczna niewątpliwie staje się trudniejsza. Należy przestrzegać zasad bezpieczeństwa oraz postawić na personalizację procedur oraz oferowanych rozwiązań korekcji wad wzroku i terapii widzenia. Warto podkreślić, że badanie okulistyczne i optometryczne przeprowadzone zgodnie z zasadami epidemiologicznymi nie jest obarczone zwiększonym ryzykiem zakażenia SARS-CoV-2.
The highly contagious virus SARS-CoV-2 that causes the serious respiratory disease COVID-19 has posed a tremendous challenge to our daily optometric and ophthalmologic contact lens practice. The pandemic is still evolving. Its impact on public health has been significant and intensified and will result in significant economic and social changes. In the time of coronavirus, contactology is undoubtedly becoming more difficult. We should focus on both safety and the personalization of procedures and solutions that are offered to correct vision defects. Nevertheless, we should remember that ophthalmologic and optometric tests that are performed in accordance with epidemiological guidelines are not associated with a higher risk of SARS-CoV-2 infection.
Źródło:
OphthaTherapy; 2020, 7, 2; 155-160
2353-7175
2543-9987
Pojawia się w:
OphthaTherapy
Dostawca treści:
Biblioteka Nauki
Artykuł
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