Influence of environmental factors on contact lenses properties

• Autorzy: Czerwińska E. , Szaraniec B. , Cholewa-Kowalska K.
• Języki publikacji: EN

Abstrakty

EN

Nowadays contact lenses are a very common way of vision correction. To be used successfully, they must meet a number of conditions. This article describes studies on the influence of environmental factors such as low temperature (4°C), high temperature (60°C), various fluids (simulated tear fluid (STF), physiological saline, multi-purpose contact lens solution) and ultraviolet radiation on the properties (wettability, dehydration, UV-vis transmission, surface structure/ microstructure) of 3rd generation silicone hydrogel contact lenses. Contact angle measurement device, gravimetric method (measurement of dehydration), UV-vis spectrophotometry, ATR spectroscopy and SEM microscopy were used during the research. The results showed that environmental factors can influence some features of comfilcon A contact lenses. The reduction of contact lens water content, being the result of a long-term storage at high temperature, might cause changes in their elasticity, thereby sense of discomfort for the user, while storage in physiological saline causes slight decrease in visible light transmission. What is more, the temperature and fluids used for storage of silicone hydrogel contact lenses, as well as ultraviolet radiation affect the microstructure of analysed lenses.

Słowa kluczowe

EN

comfilcon A; silicone hydrogel contact lenses; simulated tear fluid (STF); durability; environmental factors

• Wydawca: Polish Society for Biomaterials in Cracow
• Czasopismo: Engineering of Biomaterials
• Rocznik: 2018
• Tom: Vol. 21, no. 144
• Strony: 20--27
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr., zdj.

Twórcy

autor

Czerwińska E.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Krakow, Poland

autor

Szaraniec B.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Krakow, Poland

autor

Cholewa-Kowalska K.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Glass Technology and Amorphous Coatings, Al. Mickiewicza 30, 30-059 Krakow, Poland

Bibliografia

• [1] Remington J.P., Beringer P.: The Science and Practice of Pharmacy 22nd ed., Pharmaceutical Press, London 2012.
• [2] Jones L.: Modern contact lens materials: A clinical performance update. Contact Lens Spectrum 17 (9) (2002) 24-35.
• [3] Szczotka-Flynn L.: Looking at Silicone Hydrogels Across Generations, Optometric Management, Issue: May 2008.
• [4] Caló E., Khutoryanskiy V.V.: Biomedical applications of hydrogels: A review of patents and commercial products, European Polymer Journal 65 (2015) 252-267.
• [5] Behar-Cohen F., Baillet G., Ayguavives T., Ortega Garcia P., Krutmann J., Peña-García P., Reme C., Wolffsohn J.S.: Ultraviolet damage to the eye revisited: eye-sun protection factor (E-SPF®), a new ultraviolet protection label for eyewear, Journal of Clinical Ophthalmology 82 (2014) 87-104.
• [6] Filipecki J., Kotynia K., Filipecka K.: Investigation of the Degree of Disorder of the Structure of Polymer Soft Contact Lenses Using Positron Annihilation Lifetime Spectroscopy PALS, Polymers in Medicine 46 (2016) 17-23.
• [7] Manesis N.J., Back A.: Silicone Hydrogel Contact Lenses, patent no. US20140200286 A1, filing date: 14.01.2013, publication date: 17.07.2014
• [8] Marques M.R.C., Loebenberg R., Almukainzi M.: Simulated Biological Fluids with Possible Application in Dissolution Testing; Dissolution Technologies 18(3) (2011) 15-29.
• [9] Meneu J.J.: What’s the UV Index and Why Do Smart Clothing Manufacturers Care? Arrow Electronics (2016).
• [10] Y.C. Lai, M.T. Yeh, H.Y. Li, W.J. Ting: Silicone hydrogel composition and silicone hydrogel contact lenses made from the composition, patent no. EP 2738221 A1, filing date: 10.06.2013, publication date: 04.06.2014
• [11] B. Pankowska, I. Wojciechowska: Contact lenses, Volumed Press, Wrocław 1994
• [12] L. Moore, J.T. Ferreira: Ultraviolet (UV) transmittance characteristics of daily disposable and silicone hydrogel contact lenses; Contact Lens & An terior Eye 29 (2006) 115-122.
• [13] R. Fuentes, E. Fernández, I. Pascual, C. García: UV-Visible Transmittance of Silicone-Hydrogel Contact Lenses measured with a fiber optic spectrometer Proc. of SPIE Vol. 8785, 8785AZ, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers and Applications.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).