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KMID : 1011420150200020117
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Journal of Korean Ophthalmic Optics Society
2015 Volume.20 No. 2 p.117 ~ p.124
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Comparison of Accommodative Function of Young Adults in their Twenties Wearing Monovision, Modified Monovision and Multifocal Soft Contact Lenses
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이아영:Lee A-Young
김정미:Kim Jeong-Mee/이군자:Lee Koon-Ja
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Abstract
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Purpose: The purpose of this study was to compare the accommodative function of young adult in their 20s wearing monovision, modified monovision, and aspheric multifocal contact lenses at near task.
Methods: Thirty young adults (23.53±2.37 years) were fitted with monovision, modified monovision (the application of single vision contact lenses and center-near low addition aspheric multifocal contact lenses), and aspheric center-near
multifocal contact lenses. After wearing these modalities during a week for adaption, and after watching visual display at computer for inducing accommodative pressure for 1 hour. The following assessments of accommodative function were made: contrast visual acuity (VA) at distance and near; accommodative response; near accommodative facility; and negative relative accommodation (NRA)/positive relative accommodation (PRA). All measurements were carried out binocularly.
Results: In binocular distance VA with contrast of 10%, monovision was the worst among the four modalities (p=0.005). In accommodative response at 1 m (1.00 D), monovision was the lowest (p<0.05) and accommodative response at 40 cm (2.50 D) with monovision was lower than that of modified monovision and multifocal contact lens (p<0.05). We also found that there were no significant differences in accommodative facility and NRA/PRA among the four modalities.
Conclusions: In young adult (20s), monovision with low add reduced the accommodative response at near task, however, modified monovision and multifocal lens with center-near type did not affect accommodative relaxation.
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KEYWORD
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Monovision, Modified monovision, Multifocal contact lens, Near task, Accommodative function
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