X线定位法对过小异物或低密度的眼内异物,常因显影困难而漏诊,借助CT扫描得到很好的效果。1994～1998年,我们应用CT扫描定位发现3例眼内异物漏诊。现报告如下。例1:男,32岁,因右眼被铁屑击伤1个月视力下降而入院。眼科检查:视力右0.25,左1.0,右眼颞侧球结膜呈局限性充血,巩膜无 X-ray positioning method for small foreign bodies or low-density intraocular foreign bodies, often due to the difficulty of imaging and missed diagnosis, with CT scan to get good results. From 1994 to 1998, we found 3 cases of intraocular foreign body missed diagnosis by CT scanning. The report is as follows. Example 1: Male, 32 years old, admitted to hospital due to decreased visual acuity after being wounded by iron filings in the right eye for one month. Eye examination: visual acuity of 0.25, left 1.0, right temporal conjunctiva was localized congestion, scleral no