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KMID : 1159320180200040469
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Korean Journal of Vision Science
2018 Volume.20 No. 4 p.469 ~ p.482
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Changes in Spherical Aberration and Coma Aberration after Wearing Aspheric Soft Contact Lens in Young Myopes
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Lim Dong-Kyu
Kwon Hyeok
Lee Koon-Ja
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Abstract
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Purpose : We investigated the change of spherical and comma aberrations after wearing aspheric soft contact lens (ASCL) in young myopes.
Methods : Fifty young myopes (23.15±1.70 years, spherical equivalent: ?2.90±1.75 D) were recruited and refractive errors were corrected using ASCL (Biotrue, Bausch+Lomb, USA). High order aberrations were measured in the 4 mm pupil size using the wavefront analyze and pupil sizes were measured with a pupillometer at the modes of scotopic condition (light off) at 3.5 m in the 100 lx illuminance condition.
Results : Spherical aberrations and coma aberration of the 20s myopes were 0.026±0.031 ㎛ and 0.078±0.039 ㎛ respectively, and 0.019±0.026 ㎛ and 0.082±0.038 ㎛ after ASCL wear that spherical aberration was decreased and coma aberration was increased. However, spherical aberration was decreased in the 68% of the subject have positive spherical aberration, and increased in the 11% of the subject have negative spherical aberration. Coma aberration was increased in the 53% of the subject, did not change in the 19% of the subjects, and decreased in the 28% of the subject. Spherical aberration was not different with the refractive errors in low and moderate myopies, however, coma aberrations was higher in the higher myopes.
Conclusion : In a scotopic condition without accommodation stimuli, spherical aberration is decreased after wearing ASCL, however in the subject have negative spherical aberration spherical aberration could be increased, and which is thought to be the influence of contact lens design and pupil size.
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KEYWORD
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Aspheric soft contact lens, Coma aberration, Pupil size, Spherical aberration
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