Accurate intraocular lens power calculation after myopic laser in situ keratomileusis, bypassing corneal power
Accepted 22 August 2005.
Purpose
To describe a novel method for calculating intraocular lens (IOL) power after myopic laser in situ keratomileusis (LASIK) without using the inaccuracies of the post-LASIK corneal power.
Setting
Department of Ophthalmology, Wake Forest University Eye Center, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA.
Methods
This retrospective chart review comprised 9 eyes of 9 patients who had phacoemulsification after LASIK using our method for IOL calculation. This new method assumes the patient never had myopic LASIK to calculate IOL power and then targets the IOL at the pre-LASIK amount of myopia. The pre-LASIK keratometry values, pre-LASIK manifest refraction, and the current axial length are placed in the Holladay formula, bypassing the post-LASIK corneal power. In theory, assuming that the patient had satisfactory LASIK results, the correct IOL can then be determined.
Results
The mean spherical equivalent postoperative refraction was +0.03 diopter (D) ± 0.42 (SD) (range −0.625 to +0.75 D). In all 9 eyes, our method consistently chose the most accurate and precise IOL compared with other methods.
Conclusions
The new method of calculating IOL power after LASIK provided excellent results and the most accurate and precise results to date.
From the Department of Ophthalmology, Wake Forest University Eye Center, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
Reprint requests to Keith A. Walter, MD, Wake Forest University Department of Ophthalmology Medical Center Boulevard Winston-Salem, NC 27157-1033 USA.
No author has a financial or proprietary interest in any material or method mentioned.
ABSTRACT