Purchase this article with an account.
James W. Davis, Howard A. Ketelson; Surface Characterization of Dailies Contact Lens Material. Invest. Ophthalmol. Vis. Sci. 2012;53(14):6116.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
This study describes the wetting and lipophilic properties of two silicone hydrogel daily disposable contact lenses, DAILIES TOTAL1® (DT1) and ACUVUE® TruEye® (ATE), under various experimental conditions from out of pack, 24 hour saline soak and air/saline rinses.
Two contact angle methods were used to measure the advancing contact angles (ACA) of the lenses. The sessile drop (SD) was used to measure the static angle, while Captive Bubble (CB) was used to measure the static and dynamics of re-wetting. The bulk and lens surface properties were characterized using a lipophilic dye, Sudan IV, soak with the lenses. This was then extracted and UV-VIS absorbance was measured at the maxima.
SD demonstrated low ACA for both DT1 and ATE, from OOP, 3.3° ± 2° and 2.3° ± 2° respectively. SD demonstrated low ACA for both DT1 and ATE, from a 24hour saline soak, 3.8° ± 2° and 4.8° ± 2° respectively. SD demonstrated significant differences in ACA for both DT1 and ATE, from 10 cycle rinse with saline/90sec air, 32.2° ± 4° and 89.6° ± 5° respectively (p<0.05). For CB, both lenses demonstrated low ACA for OOP and 24 hour saline soak. CB demonstrated differences in ACA at 160sec for both DT1 and ATE from 10 cycle rinse with saline/90sec air, 21.9° ± 3° and 30.3° ± 5° respectively (p<0.05). The lipophilic dye amount from 16 hour exposure demonstrated a lower amount for DT1, 920ppm ± 60ppm, vs ATE, 2900ppm ± 130ppm (p<0.05).
We demonstrate that the new DAILIES® TOTAL1® provides superior wetting and hydrophilic properties under various experimental and environmental conditions. The new DAILIES® TOTAL1® material has superior hydrophilic surface and bulk properties that can impact in-eye daily lens performance.
This PDF is available to Subscribers Only