Toric Intraocular Lens Results Considering Posterior Corneal Astigmatism with Online Calculators: Phacoemulsification vs. Femtosecond

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Fernández, Joaquín and Rodríguez Vallejo, Manuel and Burguera, Noemí and Salvestrini, Patrizia and Garzón Jiménez, Nuria (2021) Toric Intraocular Lens Results Considering Posterior Corneal Astigmatism with Online Calculators: Phacoemulsification vs. Femtosecond. Optics, 2 (3). 9 p.. ISSN 2673-3269

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Official URL: https://doi.org/10.3390/opt2030017




Abstract

To evaluate the prediction error (PE) obtained in Phacoemulsification (Phaco) or Femtosecond (Femto) surgeries without considering posterior corneal astigmatism correction (non-PCA) versus the correction based on Abulafia-Koch + Medicontur (AK) and Barrett calculators in toric intraocular lens (IOL) power calculation. 58 right eyes were retrospectively retrieved from our dattabase. Two groups formed by 28 and 30 eyes depending on the surgery type, Phaco or Femto respectively, were defined. Astigmatism PE were evaluated considering the approach used for calculation of the implanted IOL power (AK) versus the estimation of PEs in non-PCA and Barrett formula. A doubly-multivariate analysis was conducted to assess the differences between-surgery types, within-methods of calculation, and interaction. Mean centroid PE was significantly different between non-PCA, AK and Barrett approaches (p < 0.0005), and neither differences (p < 0.239) nor interaction (p = 0.672) between Phaco or Femto were found. Post-hoc univariate analysis showed a higher PE for the x-component of the non-PCA method versus AK (0.15 D, p < 0.0005) and non-PCA versus Barrett (0.18 D, p < 0.0005), though no differences were found between AK and Barrett (0.03 D, p = 0.93). Against-the-rule under-correction and with-the-rule overcorrection were found in both arms when PCA was not considered. Both calculators provide comparable clinical results.


Item Type:Article
Additional Information:

Received: 19 July 2021 / Revised: 26 August 2021 / Accepted: 1 September 2021 / Published: 3 September 2021
(This article belongs to the Special Issue Novel Research on Optometry and Vision Sciences)

Uncontrolled Keywords:Toric intraocular lens; Prediction error; Posterior corneal astigmatism; Femtosecond; Phacoemulsification
Subjects:Medical sciences > Optics > Contact lenses
Medical sciences > Optics > Optometry
ID Code:67681
Deposited On:14 Dec 2021 13:19
Last Modified:14 Dec 2021 13:37

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