Atanassov M, Sivkova N, Konareva-Kostianeva M
Department of Ophthalmology, Higher Medical Institute, Plovdiv, Bulgaria.
Folia Med (Plovdiv). 1998;40(3B Suppl 3):55-7.
The purpose of the study is to establish the amount of surgically induced astigmatism after extracapsular cataract extraction (ECCE) and intraocular lens (IOL) implantation. Eighty three eyes of 79 patients who had ECCE + IOL implantation were examined in the period between the 6th and the 16th month after the operation. The pre- and post-operative auto keratometry readings (K1 and K2) were recorded for each patient. These readings were compared between themselves, as well as with the post-operative cylinder power estimated by an autorefractor (total astigmatism). The mean pre-operative corneal astigmatism (K1-K2) was 1.00 +/- 0.09 Dpt Cyl, and the mean post-operative -1.74 +/- 0.14 Dpt Cyl. The difference is statistically significant. The mean autorefractor cylinder power was 1.70 +/- 0.14 Dpt Cyl. It correlates strong with the post-operative corneal astigmatism. There is a moderate correlation between the degree of the post-operative corneal and total astigmatism. The surgically induced corneal astigmatism is the main component of the total post-operative astigmatism after ECCE + IOL implantation. The total astigmatism is mainly with the rule (vertical plus cylinder) and it does not seem to impair severely the post-operative visual acuity of the patients.
本研究的目的是确定白内障囊外摘除术（ECCE）及人工晶状体（IOL）植入术后手术诱导散光的量。对79例接受ECCE + IOL植入术患者的83只眼在术后第6至16个月期间进行了检查。记录每位患者术前和术后的自动角膜曲率计读数（K1和K2）。将这些读数相互比较，以及与自动验光仪估计的术后柱镜度数（总散光）进行比较。术前平均角膜散光（K1 - K2）为1.00±0.09 Dpt Cyl，术后平均为 - 1.74±0.14 Dpt Cyl。差异具有统计学意义。自动验光仪平均柱镜度数为1.70±0.14 Dpt Cyl。它与术后角膜散光高度相关。术后角膜散光程度与总散光之间存在中度相关性。手术诱导的角膜散光是ECCE + IOL植入术后总术后散光的主要组成部分。总散光主要为顺规（垂直加柱镜），似乎并未严重损害患者的术后视力。
