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Intraocular lens power calculation after laser in situ keratomileusis: Aphakic refraction technique
Richard J Mackool1, Wilson Ko, Richard Mackool
1Mackool Eye Institute, Astoria, New York, USA.
Journal of Cataract and Refractive Surgery
|April 25, 2006
Summary
The aphakic refraction technique accurately calculates intraocular lens (IOL) power for cataract surgery patients with prior laser vision correction (LASIK). This method ensures precise refractive outcomes after lens implantation in complex eyes.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Cataract Surgery
Background:
- Previous laser in situ keratomileusis (LASIK) alters corneal curvature, complicating standard intraocular lens (IOL) power calculations.
- Accurate IOL power selection is crucial for achieving desired visual outcomes after cataract extraction.
Purpose of the Study:
- To evaluate the accuracy of a novel aphakic refraction technique for IOL power calculation.
- To assess refractive outcomes in eyes undergoing cataract surgery after prior LASIK.
Main Methods:
- Retrospective study of 12 eyes from 9 patients with a history of LASIK.
- Cataract removal without IOL implantation, followed by manifest aphakic refraction.
- IOL power calculated using the Mackool algorithm based on aphakic refraction, with subsequent lens implantation.
Main Results:
- Postoperative refractive error ranged from +0.50 D hyperopia to -0.75 D myopia.
- The aphakic refraction technique demonstrated high accuracy in predicting the refractive outcome.
Conclusions:
- The aphakic refraction technique is a highly accurate method for IOL power calculation in post-LASIK eyes.
- Despite a small sample size, the technique shows promise for improving refractive predictability in complex cataract cases.