Ponzini, E. and Borghesi, A. and Galli, A. and Maspero, F. (2024) Dehydration and surface friction of Kalifilcon A and Senofilcon A contact lenses. Il nuovo cimento C, 47 (5). pp. 1-6. ISSN 1826-9885
|
Text
ncc13036.pdf - Published Version Download (217kB) | Preview |
Abstract
In the context of contact lens (CL) wear, it is crucial to tailor the dehydration tendency and surface friction of CLs to ensure comfort. This becomes particularly significant when dealing with eyes with damaged or absent glycocalyx, leading to increased shear stress during blinking, as seen in cases of dry eye. Some manufacturers claim that the properties of their CLs are specifically crafted to retain hydration, ensuring comfort even for individuals experiencing CL discomfort and dry eye symptoms. This study focuses on evaluating and comparing the properties of two silicone hydrogel (SiHy) materials, Kalifilcon A and Senofilcon A. Three key aspects were examined: i) the hydration (WCwear) of CLs after six hours of wear, compared to the CL equilibrium water content (EWC), ii) the in-vitro coefficient of friction of the CL surface at WCwear, and iii) the in-vitro dehydration profile from EWC down to WCwear, under conditions of temperature and humidity mimicking typical wear conditions. The results suggest that WCwear is lower than EWC by a few percentage points for both materials, in-vitro friction is slightly higher for the SiHy Kalifilcon A than for the SiHy Senofilcon A, and the SiHy Kalifilcon A dehydration profile shows the typical behavior of hydrogels, in contrast to Senofilcon A, which shows the typical behavior of SiHys.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 23 Jan 2025 14:30 |
| Last Modified: | 23 Jan 2025 14:30 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23353 |
Actions (login required)
 |
View Item |
