有些病例,摘出眼内异物对眼球有很大危险;而长期留存眼内,并发铁末或铜末沉着症,发生晶状体的改变及继发性外伤性青光眼。为了增进视力或必须降低眼压以保持视功能的这些病例,施行白内障摘出或抗青光眼术颇为困难,由于害怕发生并发症,故常为医生所拒绝。但是经验证实,在这些病例施行手术 In some cases, the extraction of intraocular foreign body is a great risk to the eye; while long-term retention of the eye, complicated with iron or copper terminal complications, the lens changes and secondary traumatic glaucoma. In order to improve the visual acuity or to reduce the intraocular pressure in order to maintain the visual function of these cases, the implementation of cataract extraction or anti-glaucoma surgery is very difficult, because of fear of complications, it is often rejected by doctors. However, experience has shown that surgery is being performed in these cases