1. AFM in peak force mode applied to worn siloxane-hydrogel contact lenses.
- Author
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Abadías, Clara, Serés, Carme, and Torrent-Burgués, Juan
- Subjects
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ATOMIC force microscopy , *SILOXANES , *HYDROGELS , *CONTACT lenses , *MECHANICAL behavior of materials , *SURFACE topography - Abstract
The objective of this work is to apply Atomic Force Microscopy in Peak Force mode to obtain topographic characteristics (mean roughness, root-mean-square roughness, skewness and kurtosis) and mechanical characteristics (adhesion, elastic modulus) of Siloxane-Hydrogel Soft Contact Lenses (CLs) of two different materials, Lotrafilcon B of Air Optix (AO) and Asmofilcon A of PremiO (P), after use (worn CLs). Thus, the results obtained with both materials will be compared, as well as the changes produced by the wear at a nanoscopic level. The results show significant changes in the topographic and mechanical characteristics of the CLs, at a nanoscopic level, due to wear. The AO CL show values of the topographic parameters lower than those of the P CL after wear, which correlates with a better comfort qualification given to the former by the wearers. A significant correlation has also been obtained between the adhesion values found after the use of the CLs with tear quality tests, both break-up-time and Schirmer. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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