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KMID : 1159320190210030421
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Korean Journal of Vision Science
2019 Volume.21 No. 3 p.421 ~ p.431
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Effect of Lower-order Aberrations and Higher-order Aberrations in Laser Refractive Surgery Patients
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Kim Jeong-Mee
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Abstract
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Purpose: To investigate the effect of lower-order aberrations (LOAs) and higher-order aberrations (HOAs) in laser refractive surgery patients compared to the emmetropes.
Methods: 118 eyes of refractive surgery subjects and 36 eyes of emmetropes were enrolled. One of the subjects’ criteria was best unaided monocular visual acuity of 1.0 or better. Ocular LOAs and HOAs for a 6 mm pupil diameter were measured using a wavefront analyzer. Post-op group was divided into two post-op groups, classified by pre-op spherical equivalent refractive errors (SE) of <-6.00 D and ≥-6.00 D.
Results: There were significant differences in the magnitude of ocular LOA and HOAs for a 6 mm pupil among the three groups (defocus: p=0.013, total HOAs: p=0.000, 3rd-order: p=0.001, 4th-order: p=0.000, coma: p=0.000, and SA: p=0.000), but there was no difference when comparing the magnitude of astigmatism(p=0.932). There were correlations in the post-op group between each term of HOAs and defocus (total HOAs: r=0.378, p=0.000, coma: r=0.279, p=0.002, and SA: r=0.418, p=0.000), but no correlation was found between the LOAs and HOAs in emmetropes.
Conclusion: The magnitude of LOAs, except for astigmatism, and HOAs of each term increased with increasing preoperative SE in the post-op group compared to the emmetropes.
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KEYWORD
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Defocus, Higher-order aberrations, Lower-order aberrations, Refractive surgery
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