Tagawa Kosaku, Higashide Tomomi, Sugiyama Kazuhisa, Kawasaki Kazuo
Department of Ophthalmology, Yatsuo General Hospital, Toyama, Japan.
Nippon Ganka Gakkai Zasshi. 2007 Sep;111(9):716-21.
To compare surgically induced astigmatism among 3 sizes of temporal corneal incisions in cataract surgery.
A retrospective review was carried out of case records of 48 patients (64 eyes) who underwent cataract surgery. The length of the corneal incision was 1.6 mm in five eyes, 2.2 mm in 33 eyes, and 3.0 mm in 26 eyes. Astigmatism was measured by keratometry readings before and 1 week, 1 month, and 3 months after surgery. Surgically induced astigmatism was calculated by vector analyses using the Cravy method.
One week postoperatively, the mean surgically induced astigmatism was 0.00 +/- 0.69 diopter(D) in the 1.6 mm group, -0.05 +/- 0.61 D in the 2.2 mm group and 0.44 +/- 0.57 D in the 3.0 mm group. Three months after surgery, the mean surgically induced astigmatism was -0.05 +/- 0.08 D in the 1.6 mm group, -0.04 +/- 0.47 D in the 2.2 mm group and 0.47 +/- 0.59 D in the 3.0 mm group. The surgically induced astigmatism was significantly less in the 2.2 mm group than in the 3.0 mm group.
The amount of induced astigmatism was significantly less in temporal corneal micro-incision cataract surgery than in small incision surgery.
比较白内障手术中3种不同大小颞侧角膜切口所致的手术性散光。
对48例（64眼）接受白内障手术患者的病历进行回顾性研究。角膜切口长度为1.6mm的有5眼，2.2mm的有33眼，3.0mm的有26眼。分别于术前、术后1周、1个月及3个月通过角膜曲率计测量散光情况。采用Cravy法通过矢量分析计算手术性散光。
术后1周，1.6mm组平均手术性散光为0.00±0.69屈光度（D），2.2mm组为-0.05±0.61D，3.0mm组为0.44±0.57D。术后3个月，1.6mm组平均手术性散光为-0.05±0.08D，2.2mm组为-0.04±0.47D，3.0mm组为0.47±0.59D。2.2mm组的手术性散光明显低于3.0mm组。
颞侧角膜微小切口白内障手术所致散光量明显低于小切口手术。
