Purchase this article with an account.
Nicole M Putnam, Florencia Yeh, Ngoc Le, Sean Rowan, Tal Quirl, Robert Potter, Andrew Mackelprang, Wendy Watkins Harrison; Daily soft contact lens preference and visual performance as a function of wear time and natural corneal aberrations. Invest. Ophthalmol. Vis. Sci. 2017;58(8):3055.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Factors governing comfort and clarity in daily soft contact lens wear are numerous and relate to both the lenses characteristics and the wearer. This study seeks to better understand the relationship between comfort and clarity in daily soft contact lens wear and the influence of subjective ratings, wear time, and corneal aberrations on this impression.
23 experienced soft contact lens wearers, 18-39 years old with 11.7 ± 4.4 years of wear, were included in this study. Subjects were blindly fit in etafilcon A 58% and nelfilcon A 69% spherical daily disposable hydrogel soft contact lenses. Visual acuity (VA) and corneal aberrations (5mm pupil size) were measured using the Freiburg Vision test and Pulsar tomographer, respectively, through the study lenses. Subjects reported on lens comfort and clarity on a scale of 1-10 and returned after 4-8 hours of wear for repeat measurements.
Total RMS corneal aberration values correlated with VA measured in the AM in both habitual (p<0.01) and study lenses (p=0.05) and in the PM (p=0.03) with the study lenses. There was a correlation between change in VA over the day and subjects’ wear time with longer wear times performing worse, as expected (p=0.02). At both the start and end of day, perceived lens comfort was associated with perceived clarity of vision (all p<0.01). There was a correlation between VA and ratings of clarity in the AM (p<0.01) and the PM (p<0.01). This was also true for VA and ratings of comfort in the AM (p<0.01) and PM (p=0.02). Nelfilcon A 69% was more stable over the course of the day with fewer subjects dropping a line of acuity (5 vs 6) and more stable ratings of comfort and clarity, though these changes did not reach significance. A significant difference was observed for the AM comfort rating (5.33 vs 8.85, p<0.01) between the groups reporting increased and decreased comfort and also for PM clarity (8.75 vs 7, p=0.01) between the groups reporting increased and decreased clarity.
Wear time and total RMS corneal aberration measurements were associated with acuity in the study lenses and habitual lenses, indicating both measures impact visual experience. Perception of lens comfort was related to visual quality with initial perception of comfort and final perception of clarity of vision playing a greater role than changes throughout the day.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
This PDF is available to Subscribers Only