J Korean Med Sci.  2005 Oct;20(5):860-865. 10.3346/jkms.2005.20.5.860.

Visual Quality after Wavefront-Guided LASIK for Myopia

• Kim H
• Joo CK

• KMID: 1781772
• DOI: http://doi.org/10.3346/jkms.2005.20.5.860

Abstract

This study evaluated the visual quality after wavefront-guided laser in situ keratomileusis (LASIK) for treating myopia. Thirty-two eyes with moderate myopia (-5.78~-2.17D) and 25 eyes with high myopia (-7.78~-6.17D) were prospectively reviewed. The contrast sensitivity (CS), glare and the total higher order aberrations (HOA) were measured before and 1 week, 1 month and 2 months after LASIK. The pupil diameter was measured at day- and night-time illumination. The CS and glare at all spatial frequencies were not reduced after wavefront-guided LASIK (p<0.05) and the difference between the moderate and high myopia group was not significant. No significant correlation was found between the amounts of myopia and the postoperative CS (p>0.05). The area under the log contrast sensitivity function (AULCSF) showed no correlation with the total HOA (r2=-0.071, p=0.612, between the daytime AULCSF and the total HOA with a 4 mm entrance pupil, r2=-0.176, p=0.260, between the nighttime AULCSF and the total HOA with a 6 mm entrance pupil). There was no decrease in CS and glare after wavefront-guided LASIK for myopia. In conclusion, wavefront-guided LASIK based on the individual ablation patterns is a good option for refractive surgery to improve the visual quality in both moderate and high myopia cases.

Keyword

Contrast Sensitivity; High Order Aberration; Glare; Keratomileusis, Laser In Situ; Myopia; Wavefront

MeSH Terms

Adult
Comorbidity
Female
Humans
Keratomileusis, Laser In Situ/*statistics and numerical data
Korea/epidemiology
Male
Myopia/*diagnosis/epidemiology/*surgery
Prognosis
Recovery of Function
Research Support, Non-U.S. Gov't
Treatment Outcome
Vision Disorders/*diagnosis/epidemiology/*prevention and control
*Vision Tests
*Visual Acuity

Figure

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  Fig. 1 The mean daytime (100 cd/m2) contrast sensitivity for the 5 spatial frequencies over time. Contrast sensitivity increased at 7.5 cpd at 1 month after wavefront-guided LASIK in moderate myopia (p=0.018). Contrast sensitivity of all other frequencies were not significantly different after wavefront-guided LASIK (p>0.05).

• 

  Fig. 2 The mean nighttime (30 cd/m2) contrast sensitivity for the 5 spatial frequencies over time. Contrast sensitivity increased at 7.5 cpd at 2 month after wavefront-guided in moderate myopia (p=0.005). Contrast sensitivity of all other frequencies were not significantly different after wavefront-guided LASIK (p>0.05).

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  Fig. 3 Comparison of daytime (100 cd/m2) contrast sensitivity between moderate myopia and high myopia after wavefront-guided LASIK. Contrast sensitivity of all frequencies were not significantly different in the two groups (p>0.05).

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  Fig. 4 Comparison of nighttime (30 cd/m2) contrast sensitivity between moderate myopia and high myopia after wavefront-guided LASIK. Contrast sensitivity of all frequencies were not significantly different in the two groups (p>0.05).

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  Fig. 5 Correlation of area under the log contrast sensitivity Function (AULCSF) and total high order aberration (HOA) 2 month after wavefront-guided LASIK. (A) AULCSF in daytime (100 cd/m2) versus total HOA with 4 mm entrance pupil. (r2=-0.071, p=0.612), (B) AULCSF in nighttime (30 cd/m2) versus total HOA with 6 mm entrance pupil (r2=-0.176, p=0.260).

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