Koch D D, Haft E A, Gay C
Cullen Eye Institute, Baylor College of Medicine, Houston, Texas 77030.
J Cataract Refract Surg. 1993;19 Suppl:166-9. doi: 10.1016/s0886-3350(13)80401-4.
We used computerized videokeratography to analyze corneal topographical changes in 39 eyes of 39 patients who had phacoemulsification and posterior chamber lens implantation through 4 mm incisions. In one group of patients, the incisions were closed with a single vertical mattress suture; in the other group, no sutures were used. Computerized videokeratography was performed preoperatively and at one and five to six weeks postoperatively; corneal curvatures were assessed at radial distances of 0.75, 1.5, 2.5, and 3.5 mm along the 0-, 90-, 180-, and 270-degree semimeridians. At one week postoperatively, there was slightly more steepening along the 90- and 270-degree semimeridians (up to 0.9 diopters [D]) and slightly more flattening along the 0- and 180-degree semimeridians (up to 0.6 D) in the sutured group. At six weeks postoperatively, all mean semimeridional changes were less than 0.5 D. Computerized videokeratography demonstrated that sutured and unsutured 4 mm incisions induced clinically small corneal topographic changes and detected local variations in corneal curvature that may be due to sutures, cautery, and other operative factors.
我们使用计算机化角膜地形图分析了39例患者39只眼在通过4mm切口行超声乳化白内障吸除及后房型人工晶状体植入术后角膜地形图的变化。一组患者的切口用单根垂直褥式缝线缝合；另一组未使用缝线。术前及术后1周和5至6周进行计算机化角膜地形图检查；沿0°、90°、180°和270°半子午线在0.75、1.5、2.5和3.5mm的径向距离处评估角膜曲率。术后1周，缝合组在90°和270°半子午线上有稍多的变陡（高达0.9屈光度[D]），在0°和180°半子午线上有稍多的变平（高达0.6D）。术后6周，所有平均半子午线变化均小于0.5D。计算机化角膜地形图显示，缝合和未缝合的4mm切口引起临床上较小的角膜地形图变化，并检测到可能由缝线、烧灼和其他手术因素导致的角膜曲率局部变化。
