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KMID : 1159320210230020219
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Korean Journal of Vision Science
2021 Volume.23 No. 2 p.219 ~ p.229
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Changes of High Order Aberration with Pupil Size and Pupil Center Offset in Young Myopic Eyes
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Kwon Hyeok
Lee Koon-Ja
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Abstract
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Purpose : To analyze the correlation between the change of aberration and pupil size and the offset of pupil center (distance between cornea and pupil center) inyoung myopic eyes.
Methods : Thirty-three healthy adults (mean age: 23.03±2.89 years, mean equivalent spheric power: -3.28±1.67 D, 66 eyes) with no history of ocular surgery, and systemic disease were enrolled. The pupil sizes, pupil center offset from the vertex, and high order aberration were measured three times in a scotopic (0 lx) and photopic (20 lx) condition adjusted by the instrument using a Wavefront Analyzer.
Results : Under the photopic condition, the pupil size decreased by 2.00 mm compared to the scotopic condition (p<0.001) and correlated with refractive errors. The pupil center offset was increased by 0.09 and was not related with refractive error. The pupil center shift was 0.17±0.13 mm (p=0.003) and the directions of was mainly superotemporally, and superonasally. The total higher-order aberration had no correlation in both pupil size and pupil center offset, spherical aberration was correlated with pupil size (p=0.006, p=0.007), and coma aberration was correlated with pupil center offset (p=0.027, p=0.008).
Conclusion : With the illuminance changing, the pupil center shift and pupil center offset are changed, that those effects on the spherical and coma aberration, which could affect the quality of vision.
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KEYWORD
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Coma aberration, Higher-order aberration, Pupil center offset, Pupil size, Spherical aberration
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