Intraocular Lens Power Calculation in High Myopic Eyes with Previous Radial Keratotomy.
- Author:
Eui Seok HAN
1
;
Jin Hak LEE
Author Information
1. Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
High myopia;
Intraocular lens power calculation;
Orbscan II;
Radial keratotomy
- MeSH:
Cataract;
Cornea;
Keratotomy, Radial*;
Lenses, Intraocular*;
Myopia;
Retrospective Studies
- From:Journal of the Korean Ophthalmological Society
2006;47(8):1244-1250
- CountryRepublic of Korea
- Language:Korean
-
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.
