Comparison of Two Toric IOL Calculation Methods
Joint Authors
Mayer, Wolfgang J.
Kampik, Anselm
Kortuem, Karsten U.
Kern, C.
Müller, M.
Priglinger, S.
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-10
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Purpose.
To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome.
Methods.
Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values.
Prediction error, median absolute error, and refractive astigmatism error were evaluated for the standard calculator.
The predicted postoperative refraction and toric lens power values were evaluated and compared after postoperative recalculation using the Barrett calculator.
Results.
We observed a significant undercorrection in the spherical equivalent (0.19 D) by using a standard calculator (p≤0.05).
According to the Baylor nomogram and the refractive influence of posterior corneal astigmatism (PCA), undercorrection of the cylinder was lower for patients with WTR astigmatism, because of the tendency of overcorrection.
An advantage of less residual postoperative SE, sphere, and cylinder for the Barrett calculator was observed when retrospectively comparing the calculated predicted postoperative refraction between calculators (p≤0.01).
Conclusion.
Consideration of only corneal front keratometric values for toric lens calculation may lead to postoperative undercorrection of astigmatism.
The prediction of postoperative refractive outcome can be improved by using appropriate methods of adjustment in order to take PCA into account.
American Psychological Association (APA)
Kern, C.& Kortuem, Karsten U.& Müller, M.& Kampik, Anselm& Priglinger, S.& Mayer, Wolfgang J.. 2018. Comparison of Two Toric IOL Calculation Methods. Journal of Ophthalmology،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1196391
Modern Language Association (MLA)
Kern, C.…[et al.]. Comparison of Two Toric IOL Calculation Methods. Journal of Ophthalmology No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1196391
American Medical Association (AMA)
Kern, C.& Kortuem, Karsten U.& Müller, M.& Kampik, Anselm& Priglinger, S.& Mayer, Wolfgang J.. Comparison of Two Toric IOL Calculation Methods. Journal of Ophthalmology. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1196391
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196391