Alnawaiseh Maged, Zumhagen Lars, Rosentreter André, Eter Nicole
Department of Ophthalmology, University of Muenster Medical Center, Muenster, Germany.
J Ophthalmol. 2017;2017:4068963. doi: 10.1155/2017/4068963. Epub 2017 May 2.
. To evaluate changes in anterior, posterior, and total corneal astigmatism in patients after Descemet membrane endothelial keratoplasty (DMEK). . 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). . 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 () = 0.526, = 0.003), while after surgery this correlation was no longer significant ( = 0.038, = 0.843). There was a significant correlation between the vector difference between preoperative and postoperative posterior astigmatism and the change in corneal pachymetry ( = 0.47, = 0.010). . 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.
评估Descemet膜内皮角膜移植术（DMEK）后患者角膜前、后表面及总散光的变化。
我们回顾性纳入了23例患者的29只眼（年龄67.6±9.8岁，女性13例，男性10例），这些患者均接受了DMEK手术。使用旋转Scheimpflug系统（Pentacam HR，Oculus）测定DMEK术前、术后角膜前、后表面及总散光的度数和轴向。
术后中央角膜前、后表面及总散光度数无明显变化。术前，我们发现角膜前、后表面散光度数之间存在显著相关性（Spearman相关系数（）=0.526，=0.003），而术后这种相关性不再显著（=0.038，=0.843）。术前与术后后表面散光的矢量差与角膜厚度变化之间存在显著相关性（=0.47，=0.010）。
DMEK术后角膜后表面散光（尤其是轴向）以及角膜前表面与总散光之间的关系可能会发生变化。在有晶状体眼DMEK或联合手术中，为提高有晶状体眼人工晶状体屈光力计算的准确性，应考虑这一点。
