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KMID : 1159320220240030335
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Korean Journal of Vision Science
2022 Volume.24 No. 3 p.335 ~ p.347
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Change of Spherical Aberration in Early Presbyopia Wearing Center-Near Multifocal Soft Contact Lens
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Jang Hyo-Seung
Lee Koon-Ja
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Abstract
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Purpose : To investigate the change of spherical aberration (SA) and its effect on the visual acuity (VA) after wearing center-near multifocal contact lens (CN-MFCL) in the early presbyopia.
Methods : The fifty early presbyopic patients were participated. After one week of wearing a CN-MFCL, distance and near VA, SA change and additional power required to improve far and near vision were measured. The visual satisfaction was performed with the questionnaire.
Results : The average refractive and addition power of the patients were -2.65±1.67 D, and +1.15±0.05 D. The ocular SA was 0.01±0.028 μm, of which 37 subjects (72%) had positive SA (0.028±0.017 μm), and 13 subjects (28 %) had negative SA (?0.020±0.010 μm). After CN-MFCL wearing, the SA changed significantly to the negative (-) direction from 0.028±0.017 μm to -0.012±0.005 μm in the positive SA group ( <0.050), and the SA significantly increased to the negative direction from ?0.020±0.010 μm to ?0.043±0.010 μm in the negative SA group ( <0.050). The 100% distant VA (logMAR) after wearing CN-MFCL was -0.014±0.090 in the positive SA group, and 0.022±0.120 in the negative SA group that shows better distance VA in the positive SA group ( <0.001). The 100% near VA (logMAR) was 0.127±0.090 in the positive SA group, and 0.118±0.090 in the negative SA group that shows better near VA in the negative SA group ( <0.001). In the questionnaire results, the positive SA group showed good distance visual satisfaction, and the negative SA group showed good intermediate and near visual satisfaction ( <0.050).
Conclusion : The SA can be changed after wearing CN-MFCL and visual satisfaction could be changed depending on the contact lens wear’s ocular SA. Therefore, when prescribing MFCL, it is need to consider the wearer’s ocular SA to improve prescription success.
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KEYWORD
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Center-near multifocal contact lenses, Early presbyopia, Spherical aberration, Visual acuity
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