摘要
目的为了解白内障囊外摘除及人工晶体植入术后早期切口对全角膜弯曲度的影响。方法用 TMS-1型角膜地形图,记录经长约11mm 阶梯状角膜缘切口行白内障摘除及后房型人工晶体植入术的42只眼,在术后3个月内角膜屈折力及其图形变化。结果术后角膜地形图均呈现以角膜顶点为中心纵向"哑铃形"图形改变,表示垂直经线各部位的角膜变陡,屈折力增加,中央2.5mm 半径处显著大于1.5及3.5mm 处,上象限大于对应的下象限者;术后垂直经线的角膜逐渐变平,屈折力逐渐减少。结论人工晶体植入术后早期角膜地形图,出现与循规性角膜散光逐渐衰减一致的垂直经线角膜由陡变平的图形变化。
Objective The study was designed to investigate the early post-operative effect of the incision of extracapsular cataract extraction (ECCE) with intraocular lens (IOL) implantation on the whole corneal curvature.Methods TMS-1 Topographic System was used to record the changes in corneal refractive power and topography of 42 eyes within 3 months following the surgery through a 11 mm stepped limbal incision.Results The corneal topographic map showed that a vertical dumbbell con- figuration centered at the corneal top presented,the vertical corneal curvature at various radial distances steepened after the operation,the steepening at radial distance of 2.5 mm was much greater than that of 1,5 and 3.5 mm and the steepening at the upper cornea was greater than that at the corresponding low- er cornea.The postoperative vertical corneal steepening gradually flattened and the refractive power de- creased.Conclusion The topographic map early after ECCE with IOL implantation presents a flatten- ing change of vertical corneal steepening corresponding to a with-the-rule astigmatism which decreases gradually.
出处
《中华眼科杂志》
CAS
CSCD
北大核心
1996年第1期29-31,共3页
Chinese Journal of Ophthalmology
关键词
白内障摘除术
人工晶体
角膜地形图
Cataract extraction
Lenses,intraocular
Astigmatism
Corneal topographic