摘要
目的 利用角膜上方与颞侧 8mm巩膜隧道切口产生不同轴向的角膜散光 ,矫治术前散光。方法 将 32例术前有散光需植入后房型人工晶状体的白内障患者分为A、B 2组 :伴有顺规性散光 13例为A组 ,采用上方切口 ;伴有逆规性散光19例为B组 ,采用颞侧切口 ,切口长度均为 8mm。散光由角膜地形图及角膜曲率计测量确定 ,分别植入光学直径 6mm的聚甲基丙烯酸甲酯 (PMMA)硬性人工晶状体 ,随访视力、角膜地形图的改变。结果 术后 4周 2组患者的角膜沿切口子午线轻度变平 ,上方切口组的改变比颞侧切口改变要大 ,上方切口的散光矫正 (1.0± 0 .1)D ,颞侧切口矫正 (0 .6± 0 1)D ,2组术后角膜地形图改变与术前比较差异有显著意义 (P <0 .0 5 )。结论 角膜上方或颞侧巩膜隧道切口可以改变术前散光状态 ,但上方巩膜隧道切口改变角膜散光状态要大于颞侧巩膜隧道切口。
Objective To study the corneal astigmatism and the changes of surgically induced astigmatism after superior and temporal scleral tunnel incisions nonphacoemulsification with intraocular lens(IOL),implantation treat preoperative corneal astigmatism.Methods Thirty-two eyes of astigmatism were divided into two groups,13 eyes of astigmatism with the rule and 19 eyes of astigmatism against the rule treated with nonphacoemulsification through a superior and temporal inversed frown shaped tunnel incision were examined by corneal topography,which preoperative had corneal astigmatism and then implanted 6mm PMMA intraocular lens(IOL) respectively.Results At 4 weeks postoperatively,there was mild flattening along the meridian of the incision in both groups. The change was greater with the superior incisions,surgically induced astigmatism was(1.0±0.1)D in the eyes that received superior incisions,and (0.6±0.1)D in the eyes that received temporal incisions;This difference was statistically significant(P<0.05).Conclusion Postoperatively superior and temporal scleral tunnel incisions induced astigmatism and superior surgically induced astigmatism more than temporal.
出处
《眼科新进展》
CAS
2004年第4期291-292,共2页
Recent Advances in Ophthalmology
