Abstract:
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.
journal_name
J Ophthalmoljournal_title
Journal of ophthalmologyauthors
Kern C,Kortüm K,Müller M,Kampik A,Priglinger S,Mayer WJdoi
10.1155/2018/2840246subject
Has Abstractpub_date
2018-01-10 00:00:00pages
2840246eissn
2090-004Xissn
2090-0058journal_volume
2018pub_type
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journal_title:Journal of ophthalmology
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doi:10.1155/2019/1345683
更新日期:2019-05-02 00:00:00
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更新日期:2016-01-01 00:00:00
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更新日期:2020-01-28 00:00:00
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doi:10.1155/2017/8597629
更新日期:2017-01-01 00:00:00
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更新日期:2020-08-10 00:00:00
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pub_type: 杂志文章,评审
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journal_title:Journal of ophthalmology
pub_type: 杂志文章
doi:10.1155/2018/6128470
更新日期:2018-10-31 00:00:00