Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9057, USA.
J Cataract Refract Surg. 2010 Aug;36(8):1358-64. doi: 10.1016/j.jcrs.2010.01.032.
To evaluate alterations in corneal power parameters after Descemet-stripping automated endothelial keratoplasty (DSAEK) using rotating Scheimpflug imaging.
University of Texas, Southwestern Medical Center, Dallas, Texas, USA.
Eyes that had DSAEK were evaluated with a rotating Scheimpflug imaging system (Pentacam). The outcome parameters were mean anterior and posterior keratometry (K), mean anterior radius of curvature and posterior radius of curvature, anterior and posterior astigmatism, central corneal thickness (CCT), true net power, corneal volume, keratometric power deviation, and mean zonal-equivalent K readings. These values were compared with those in a control group of age and sex-matched normal eyes.
The DSAEK group comprised 32 eyes (28 patients) and the control group, 32 eyes. The mean anterior K, posterior K, and true net power were 42.53 diopters (D) +/- 1.52 (SD), -6.80 +/- 0.55 D, and 40.55 +/- 1.79 D, respectively, in the DSAEK group and 43.60 +/- 1.62 D, -6.20 +/- 0.31 D, and 42.49 +/- 1.57 D, respectively, in the control group. The posterior radius of curvature, anterior and posterior K values, and true net power were statistically significantly lower in DSAEK eyes than in control eyes (P<.01). The equivalent K readings were significantly lower in all zones in DSAEK eyes than in control eyes (P<.01). The mean CCT was significantly higher in DSAEK eyes than in control eyes (628 +/- 46 mum versus 553 +/- 35 mum) (P<.01).
The true net power of the cornea decreased significantly after DSAEK, mainly because of an increase in posterior curvature.
No author has a financial or proprietary interest in any material or method mentioned.
使用旋转式 Scheimpflug 成像评估 Descemet 膜剥离内皮角膜移植（DSAEK）术后角膜力参数的变化。
美国德克萨斯州达拉斯市德克萨斯大学西南医学中心。
使用旋转式 Scheimpflug 成像系统（Pentacam）评估接受 DSAEK 的眼睛。观察指标包括平均前、后角膜曲率（K）、平均前曲率半径和后曲率半径、前、后散光、中央角膜厚度（CCT）、真实净力、角膜容积、角膜力偏差和平均角膜子午线等效 K 值。将这些值与年龄和性别匹配的正常眼对照组进行比较。
DSAEK 组 32 只眼（28 例患者），对照组 32 只眼。DSAEK 组平均前 K 值、后 K 值和真实净力分别为 42.53 屈光度（D）+/-1.52（SD）、-6.80+/-0.55 D 和 40.55+/-1.79 D，对照组分别为 43.60+/-1.62 D、-6.20+/-0.31 D 和 42.49+/-1.57 D。DSAEK 组后曲率半径、前、后 K 值和真实净力均显著低于对照组（P<.01）。DSAEK 组所有区带的等效 K 值均显著低于对照组（P<.01）。DSAEK 组中央角膜厚度（CCT）显著高于对照组（628+/-46 μm 比 553+/-35 μm）（P<.01）。
DSAEK 术后角膜真实净力显著下降，主要是由于后曲率增加所致。
没有作者在任何提到的材料或方法中拥有财务或专有利益。
