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KMID : 1011420110160010051
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Journal of Korean Ophthalmic Optics Society
2011 Volume.16 No. 1 p.51 ~ p.60
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Near Visual Performance of Multifocal Contact Lenses in University Students
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Jeong Woo-Cheol
Kim Soo-Hyun
Kim Jai-Min
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Abstract
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Purpose: This study was to investigate visual performance and subjective satisfaction with multifocal soft contact lenses at near works in university students.
Methods: In a cross-over study design, 26 students (6 male, 20 female) who did not have any ocular disorder with at least 20/20(1.0) binocular vision were fitted with single-vision lenses (SofLensTM59, Bausch + Lomb Co. USA) or multifocal lenses (SofLens Multifocal, Bausch + Lomb Co. USA). After 2 weeks, visual performance assessments included visual acuity, stereoacuity and contrast sensitivity function at distance and near. Near point of accommodation, accommodative facility, near point of convergence, vergence facility and near range of clear vision at near were examined. Students’ satisfaction and preference were measured using survey questionaries.
Results: Subjects maintained at least 20/20 binocular vision with multifocal and single-vision lenses at distance and near. There was no difference between multifocal and single-vision lenses in stereoacuity, contrast sensitivity function and vergence facility at far and near. The near point of accommodation, accommodative facility, near point of convergence and the near range of clear vision with multifocal lenses were better than single-vision lenses. On the survey questionaries, subjects reported that they preferred and satisfied with multifocal lenses with near works, and single-vision lenses with distance works.
Conclusions: The majority of university students preferred multifocal to single vision lenses because multifocal lenses provided better visual performance at near works. This study suggests that multifocal lens is helpful for young adult in prolonged near works.
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KEYWORD
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Contact lens, Multifocal contact lens, Near visual performance
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