Abstract | PURPOSE: SETTING: Second University of Naples, Naples, Italy. DESIGN: Case series. METHODS: RESULTS: The study evaluated 257 eyes of 166 patients (93 women). Before surgery, there was a high correlation between refractive error and the product of AL and K (AL × K) (r(2) = 0.8213). In patients with refractive results close to emmetropia, the mean AL × K was 1005.91 ± 25.88 (SD), meaning that in the range of 954 and 1058, there was a 95% possibility that the patients were almost fully corrected. The following regression formula was obtained to calculate the amount of refractive error independent of cataract onset: Refractive error = -0.0157 × (AL × K) + 16.437. CONCLUSIONS: The regression formula determined whether the refraction depended on the onset of cataract and estimated the amount of undercorrection or overcorrection that occurred after refractive surgery, leading to improved estimation of the power of the IOL to be implanted. It may allow the use of history-related formulas in IOL power calculation for eyes that have had corneal refractive surgery.
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Authors | Nicola Rosa, Maddalena De Bernardo, Maria Borrelli, Michele Lanza |
Journal | Journal of cataract and refractive surgery
(J Cataract Refract Surg)
Vol. 36
Issue 12
Pg. 2123-8
(Dec 2010)
ISSN: 1873-4502 [Electronic] United States |
PMID | 21111316
(Publication Type: Journal Article)
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Copyright | Copyright © 2010 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved. |
Topics |
- Adolescent
- Adult
- Astigmatism
(physiopathology, surgery)
- Axial Length, Eye
(pathology)
- Biometry
(methods)
- Cataract
(physiopathology)
- Female
- Humans
- Lens Implantation, Intraocular
- Lenses, Intraocular
- Male
- Middle Aged
- Myopia
(physiopathology, surgery)
- Photorefractive Keratectomy
- Prospective Studies
- Refraction, Ocular
(physiology)
- Reproducibility of Results
- Young Adult
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