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• W2610681165 abstract "Purpose . To evaluate changes in anterior, posterior, and total corneal astigmatism in patients after Descemet membrane endothelial keratoplasty (DMEK). Methods . We retrospectively included 29 eyes of 23 patients (age 67.6 ± 9.8 years, 13 female, 10 male) after DMEK surgery. The magnitude and axis orientation of anterior, posterior, and total corneal astigmatism before and after DMEK were determined using a rotating Scheimpflug system (Pentacam HR, Oculus). Results . The magnitude of anterior, posterior, and total corneal astigmatism in the central cornea did not change significantly after surgery. Before surgery, we found a significant correlation between the magnitudes of anterior and posterior corneal astigmatism (Spearman’s correlation coefficient <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mfenced open=( close=)><mml:mrow><mml:msub><mml:mrow><mml:mi>r</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>S</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:mfenced><mml:mo>=</mml:mo><mml:mn>0.526</mml:mn></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mi>P</mml:mi><mml:mo>=</mml:mo><mml:mn>0.003</mml:mn></mml:math>), while after surgery this correlation was no longer significant (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:msub><mml:mrow><mml:mi>r</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>S</mml:mi></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mn>0.038</mml:mn></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:mi>P</mml:mi><mml:mo>=</mml:mo><mml:mn>0.843</mml:mn></mml:math>). There was a significant correlation between the vector difference between preoperative and postoperative posterior astigmatism and the change in corneal pachymetry (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:msub><mml:mrow><mml:mi>r</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>P</mml:mi></mml:mrow></mml:msub><mml:mo>=</mml:mo><mml:mn>0.47</mml:mn></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:mi>P</mml:mi><mml:mo>=</mml:mo><mml:mn>0.010</mml:mn></mml:math>). Conclusions . Posterior corneal astigmatism (especially the orientation) and therefore the relationship between anterior and total corneal astigmatism may change after DMEK. This should be considered to improve the accuracy of toric IOL power calculations following phakic DMEK or in combined procedures." @default.
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• W2610681165 date "2017-01-01" @default.
• W2610681165 modified "2023-09-27" @default.
• W2610681165 title "Changes in Anterior, Posterior, and Total Corneal Astigmatism after Descemet Membrane Endothelial Keratoplasty" @default.
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• W2610681165 doi "https://doi.org/10.1155/2017/4068963" @default.
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