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KMID : 1159320150170040511
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Korean Journal of Vision Science
2015 Volume.17 No. 4 p.511 ~ p.522
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Orientation and Subjective Satisfaction Survey According to 1-Day Toric Soft Contact Lens Designs
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Seo Chae-Youn
Ryu Geun-Chang
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Abstract
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Purpose: To compare orientation, re-orientation and subjective satisfaction survey according to the 1-day toric soft contact lens designs.
Methods: In this study, participants were 20 students (36 eyes) with no ocular health abnormalities and previous ocular surgery. They worn 1-day toric soft contact lenses with 3 different designs (A: Accelerated Stabilization Design, B: Optimized Prism Ballast Design, C: Lo-Torque Prism Ballast Design) for 5 days respectively and the orientation and orientation recovery were measured at initial and follow-up visits respectively. Lens orientation in primary position was
measured. In order to determine the orientation recovery, the lens was manually rotated by 30° nasally and temporally and the amount of re-orientation after 12 blinks was measured. Subjective satisfaction survey of comfort, dryness, visibility and redness was carried out at initial and follow-up visits and by wearing time on a scale of 1 to 5.
Results: The “A” lens rotated nasally and the “B” and “C” lenses rotated temporally. The “C” lens achieved better orientation at the follow-up visit and the “B” lens showed the fastest orientation recovery. Subjective satisfaction survey by wearing time had little difference among 3 different toric soft contact lenses whereas the “A” lens had better initial comfort compared to others.
Conclusion: In order to achieve stable orientation, certain time is required. Therefore, when the toric soft contact lenses are fitted, it is considered that the orientation should be rechecked at the follow-up visit.
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KEYWORD
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Toric Soft Contact Lens, Orientation, Orientation Recovery
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