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Jennie Diec, Thomas John Naduvilath, Daniel Tilia, Ravi Chandra Bakaraju; THE RELATIONSHIP BETWEEN VISION AND COMFORT IN CONTACT LENS WEAR. Invest. Ophthalmol. Vis. Sci. 2019;60(9):6366.
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© ARVO (1962-2015); The Authors (2016-present)
To understand the relationship between vision and comfort in contact lens (CL) wear
Retrospective analysis of 5 clinical trials comprising non-presbyopic (NP) myopes or presbyopic participants (Px) followed for up to 1 week whilst wearing various single vision (SV) [NP only] and simultaneous-image presbyopic designs (SM) CL. A questionnaire was administered at an assessment visit 5 – 7 days after CL fitting for all trials. The questionnaire consisted of vision ratings (vision satisfaction and clarity of vision at distance / intermediate / near) and overall comfort ratings (1 – 10 numeric rating scale). The relationship of comfort ratings with vision ratings was analysed using linear mixed model and presented as regression coefficient with 95% confidence intervals (CI).
Subjective vision had a significant impact on comfort and vice versa. However, this varied depending on the type of vision rating and the Px group. The analysis showed that whilst wearing SV CL, the ocular comfort of NP was significantly impacted by changes in vision satisfaction (0.8; 95%CI: 0.58-1.01, p≤0.001) while vision was less affected by changes in comfort (0.47; 95%CI: 0.35-0.59, p≤0.001). However, when vision in NP was significantly altered by wearing SM CLs, vision satisfaction was moderately affected by changes in comfort (0.72; 95%CI: 0.64-0.80, p≤0.001), which was not significantly different to vision’s impact on comfort (0.6; 95%CI: 0.53-0.68, p≤0.001). In presbyopic Px wearing SM CLs, their vision satisfaction was affected by changes in comfort (0.62; 95%CI: 0.55-0.70, p≤0.001) to a greater extent than was comfort affected by changes in vision (0.37; 95%CI: 0.33-0.42, p≤0.001).
Vision and comfort in contact lens wear are inter-related. Consideration of participant characteristics, visual stimulus and CL comfort needs to be accounted for when assessing overall CL experience. Ocular comfort is of greater significance in NP Px, while vision satisfaction is of greater significance in presbyopic Px.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.
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