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使用角膜地形图仪对白内障术后病人进行角膜表面弯曲度早期改变的观察。３１例病人均为行白内障囊外摘除联合后房型人工晶体植入手术，在术后第３～５天内进行角膜地形图检查，所有病人的角膜地形图改变均为蝶形领结状，表明这种术后散光是由于上方、下方角膜的弯曲度变得更为陡峭所致，与术中伤口的缝合有密切关系。
Corneal topography was used to observe the early change of corneal surface curvature after cataract surgery. All 31 patients underwent extracapsular cataract extraction combined with posterior chamber intraocular lens implantation. Corneal topography was performed within 3 to 5 days after operation. All patients had bow tie morphological changes, indicating that this Postoperative astigmatism is due to the curvature of the upper and lower cornea becomes more steep, closely related to the suture of the intraoperative wound.