Journal of the Korean Ophthalmological Society 2004;45(7):1150-1155.
Published online July 1, 2004.
The Accuracy of the Orbscan-derived Total Refractive Power after Laser in Situ Keratomileusis.
Jin Gu Park, O Sub Koo
1Department of Ophthalmology, Hanil General Hospital, Seoul, Korea.
2Department of Ophthalmology, National Medical Center, Seoul, Korea. drkos@netian.com
라식후 Orbscan(R) 각막형태검사에 의한 총각막곡률값의 정확성
박진구 ( Jin Gu Park ) , 구오섭 ( O Sub Koo )
Abstract
PURPOSE
This study was performed to evaluate the correlation between the change of the manifest refraction and change of the Orbscan-derived total refractive and axial power after laser in situ keratomileusis (LASIK). METHODS: A total of 34 consecutive eyes of 19 patients who were followed up for at least6 months after LASIK were included in study. The manifest refraction and Orbscan topography analysis of the 2, 3, 4, and 5 mm diameter zones of total refractive power and axial power maps were measured preoperatively and at least 6 month postoperatively. RESULTS: There were statistically significant correlations between all Orbscan-derived corneal power changes and changes of manifest refraction. Especially the total refractive power map in the central 4.0 mm zone gave the best statistically significant correlation with manifest refractive change (r2=0.790, p<0.01). CONCLUSIONS: These results indicate that the change of the manifest refraction in LASIK is best correlated with the change of the total refractive power map in the central 4.0 mm zone.
Key Words: Axial power;LASIK;Manifest refraction;Total refractive power


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