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KMID : 1011420210260040315
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Journal of Korean Ophthalmic Optics Society
2021 Volume.26 No. 4 p.315 ~ p.323
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Factors Affecting Contrast Sensitivity Function in Refractive Surgery Patients
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Kim Jeong-Mee
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Abstract
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Purpose: To analyze the factors influencing contrast sensitivity function to evaluate visual quality after corneal refractive surgery.
Methods: Fifty-four subjects (age, 23.56±2.38 years) who underwent conventional laser in situ keratomileusis were included. From the measured contrast sensitivity data, the area under the log contrast sensitivity function (AULCSF) was calculated. The contribution of all independent variables to AULCSF under photopic and mesopic lighting conditions after surgery was assessed using backward stepwise multiple regression analysis.
Results: In the final multiple regression model, in order of influence, corrected spherical equivalent (p=0.021), uncorrected distance visual acuity (p=0.021), total higher-order aberrations (HOAs) (p=0.030), spherical aberration (p=0.045), and ablation depth (p=0.048) were significantly associated with the photopic AULCSF. In order of influence, objective scatter index (p<0.001), total HOAs (p=0.008), and scotopic pupil size (p=0.031), were significantly associated with the mesopic AULCSF.
Conclusions: The findings of this study suggest that ocular HOAs were a factor influencing contrast sensitivity regardless of the lighting conditions, and intraocular scattering had a much greater effect on mesopic contrast sensitivity than photopic contrast sensitivity in corneal refractive surgery patients.
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KEYWORD
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Contrast sensitivity function, Refractive surgery, Visual quality
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