Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study.
Clear-cornea cataract surgery: pupil size and shape changes, along with anterior chamber volume and depth changes. A Scheimpflug imaging study.
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DOI：
10.2147/opth.s68370
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Asimellis G
中科院分区：
文献类型：
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作者：
Kanellopoulos AJ;Asimellis G
通过Scheimpflug成像提供的高精度数字分析数据，探讨白内障手术后瞳孔大小、形状和前房（AC）参数的变化。研究组86只眼，患者年龄70.58±10.33岁，行白内障摘出术联合袋内人工晶状体植入术（假性晶状体）。对照组为健康眼75只（患者年龄51.14±16.27岁）。术前和术后3个月采用Scheimpflug显像检查角膜中央厚度、AC深度和AC体积。此外，通过对Scheimpflug“大地图”中黑白虚线瞳孔边缘标记进行数字分析，分别测量了水平和垂直瞳孔直径，并计算了瞳孔偏心率。研究了AC深度和瞳孔形状参数与患者年龄的关系，以及术后AC和瞳孔大小和形状变化的关系。与术前相比，假晶状眼的交流深度和交流体积分别增加0.99±0.46 mm （39%， P<0.001）和43.57±24.59 mm3 （36%， P<0.001）。瞳孔大小分析显示，水平瞳孔直径减小了- 0.27±0.22 mm (- 9.7%， P=0.001)，垂直瞳孔直径减小了- 0.32±0.24 mm （- 11%， P<0.001）。瞳孔偏心率降低- 39.56%；P < 0.001。白内障摘除手术似乎影响瞳孔的大小和形状，可能与角膜深度增加有关。这项基于Scheimpflug成像数据的数字分析的新研究表明，白内障术后光瞳缩小且更圆。随着患者年龄的增加，这些变化似乎更为显著。
To investigate, by high-precision digital analysis of data provided by Scheimpflug imaging, changes in pupil size and shape and anterior chamber (AC) parameters following cataract surgery. The study group (86 eyes, patient age 70.58±10.33 years) was subjected to cataract removal surgery with in-the-bag intraocular lens implantation (pseudophakic). A control group of 75 healthy eyes (patient age 51.14±16.27 years) was employed for comparison. Scheimpflug imaging (preoperatively and 3 months postoperatively) was employed to investigate central corneal thickness, AC depth, and AC volume. In addition, by digitally analyzing the black-and-white dotted line pupil edge marking in the Scheimpflug “large maps,” the horizontal and vertical pupil diameters were individually measured and the pupil eccentricity was calculated. The correlations between AC depth and pupil shape parameters versus patient age, as well as the postoperative AC and pupil size and shape changes, were investigated. Compared to preoperative measurements, AC depth and AC volume of the pseudophakic eyes increased by 0.99±0.46 mm (39%; P<0.001) and 43.57±24.59 mm3 (36%; P<0.001), respectively. Pupil size analysis showed that the horizontal pupil diameter was reduced by −0.27±0.22 mm (−9.7%; P=0.001) and the vertical pupil diameter was reduced by −0.32±0.24 mm (−11%; P<0.001). Pupil eccentricity was reduced by −39.56%; P<0.001. Cataract extraction surgery appears to affect pupil size and shape, possibly in correlation to AC depth increase. This novel investigation based on digital analysis of Scheimpflug imaging data suggests that the cataract postoperative photopic pupil is reduced and more circular. These changes appear to be more significant with increasing patient age.