| Comparison of Refraction-Derived Keratometric Value and Orbscan Corneal Power after Laser in Situ Keratomileusis. |
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Hee Jun Cho, O Sub Koo |
1Department of Ophthalmology, KEPCO Medical Foundation Hanil General Hospital, Seoul, Korea.
2Department of Ophthalmology, National Medical Center, Seoul, Korea. drkos@netian.com |
| 라식 후 임상병력법과 각막지형도상의 각막굴절력 비교 |
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조희준1,구오섭2 |
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Department of Ophthalmology, KEPCO Medical Foundation Hanil General Hospital1, Seoul, Korea Department of Ophthalmology, National Medical Center2, Seoul, Korea |
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Correspondence:
Hee-Jun Cho, M.D.1 |
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| Abstract |
PURPOSE
To determine the Orbscan corneal power which gave the best correlation with refraction-derived keratometric value (clinical history method) after LASIK in cataract surgery. METHODS: A total of 38 consecutive eyes of 19 patients who were followed up for at least 1 year after LASIK were included in study. The refraction-derived keratometric values were correlated with Orbscan corneal power within 1, 2, 3, 4, and 5 mm diameter zones of keratometric, anterior and total selections of mean, axial, tangential and optical power maps. RESULTS: The Orbscan corneal power of the 5-mm zone optical power total map gave the best correlation with refraction-derived keratometric value. The following regular relationship in linear regression analysis was derived: RDKV(refraction-derived keratometric value)=0.9 X OPT5(corneal power of Orbscan optical power total map 5-mm zone)+4.941(r=0.883). CONCLUSIONS: These results indicate that the corneal power of the 5-mm zone optical power total map was the most appropriate to calculate IOL power in cataract surgery after LASIK when using Orbscan topography. |
| Key Words:
IOL power calculation;LASIK;Orbscan |
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