| Intraocular Lens Power Calculation in High Myopic Eyes with Previous Radial Keratotomy. |
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Eui Seok Han, Jin Hak Lee |
1Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
2Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute, Seoul, Korea. jjhlee@plaza.snu.ac.kr
3Department of Ophthalmology, Seoul National University Bundang Hospital, Gyeonggi-do, Korera. |
| 방사상각막절개술을 받은 고도근시안의 인공수정체 도수 계산 |
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한의석1,2,이진학2,3 |
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Department of Ophthalmology, Seoul National University College of Medicine1, Seoul, Korea Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute2, Seoul, Korea Department of Ophthalmology, Seoul National University Bundang Hospital3, Gyeonggi-do, Korera |
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Correspondence:
Eui Seok Han, M.D.1,2 |
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| Abstract |
PURPOSE
To elucidate a proper method of intraocular lens (IOL) power calculation in highly myopic eyes with previous radial keratotomy (RK). METHODS: Five post-RK-surgery eyes with pre-RK-surgery myopia over -10.0 diopters (D) were studied retrospectively. The keratometric values obtained via the clinical history method, the contact lens over-refraction method, conventional keratometry, and Orbscan II were compared to the true keratometric value calculated retrospectively using the SRK/T formula. RESULTS: The mean pre-RK-surgery refractive power was -19.35+/-5.86D (-14.50 ~ -29.50D) and cataract surgery was performed on average 16.6 years after RK. The true keratometric value was closest to that estimated by the contact lens over-refraction method in 1 eye and to the flatter keratometric value between Sim K and the 3mm zone mean Pwr obtained with axial keratometric power map of Orbscan II in 4. CONCLUSIONS: The flatter keratometric value between Sim K and the 3mm zone mean Pwr from Orbscan II was closest to the true post-RK-surgery keratometric value of the central cornea. |
| Key Words:
High myopia;Intraocular lens power calculation;Orbscan II;Radial keratotomy |
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