| Comparison of Higher-order Aberrations (HOAs) between Wavefront-guided Laser in Situ Keratomileusis and Laser Epithelial Keratomileusis. |
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Sang Joon Oh, In Sik Lee, Young Ghee Lee, Eung Kweon Kim, Jun Mo Lee, Kyoung Yul Seo |
1The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. seoky@yumc.yonsei.ac.kr
2Balgunsesang Ophthalmology Clinic, Seoul, Korea.
3Seran Eye Center, Seoul, Korea.
4Department of Ophthalmology, Pundang CHA Hospital, Pochun CHA University College of Medicine, Sungnam, Korea. |
| 웨이브프론트 방식을 이용한 라식과 라섹 수술 간의 Aberrometer 측정을 통한 고도수차의 비교 |
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오상준 ( Sang Joon Oh ) , 이인식 ( In Sik Lee ) , 이영기 ( Young Ghee Lee ) , 김응권 ( Eung Kweon Kim ) , 이준모 ( Jun Mo Lee ) , 서경률 ( Kyoung Yul Seo ) |
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| Abstract |
PURPOSE
To compare the change in higher-order aberrations (HOAs) in the treatment of myopia between two different Wavefront-guided excimer ablations: laser in situ keratomileusis (LASIK) and laser assisted subepithelial keratomileusis (LASEK). METHODS: One hundred and four eyes of 52 patients were treated with wavefront-guided LASIK while 104 eyes of 54 patients were treated with wavefront-guided LASEK. Pupil size, best-corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), manifest refraction, corneal topography, pachymetry, and wavefront aberrations were examined preoperatively. BCVA, UCVA, manifest refraction, and wavefront aberrations were measured at 1 and 3 months postoperatively. The Hartmann-Shack aberrometer (WaveScan, VISX) was used to measure the overall wavefront aberrations for scotopic pupils. RESULTS: The wavefront error of HOAs did not increase postoperatively in either group compared with preoperative values. Normalized polar Zernike coefficients compared between preoperative and postoperative values showed a statistically significant increase in spherical aberration term in the wavefront-guided LASIK group (p<0.001). Comparing normalized polar Zernike coefficients values between the two groups, the spherical and 2nd coma aberrations at postoperative 1 month in wavefront-guided LASEK were significantly higher than those of the wavefront-guided LASIK group (p=0.002, both). CONCLUSIONS: HOAs did not increase in either wavefront-guided LASIK or wavefront-guided LASEK compared to the previous conventional methods. However, the average RMS wavefront error of the HOAs was lower in the wavefront-guided LASIK group at 1 month postoperatively (p=0.0004). |
| Key Words:
Higher-order aberrations;LASEK;LASIK;Myopia;Wavefront |
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