[Clinical analysis of 160 cases with the magnetic foreign bodies in the posterior segment of the eye].

One hundred and sixty cases of magnetic foreign bodies in the posterior segment of the eye are reported. Most of the foreign bodies are small (61.2% are less than 2mm) and near the wall of the eye (73.7% are less than 2mm). 110 cases were successfully operated in conventional way and just 20 cases needed to have vitrectomy. The result of the operation depends on the damage of the eye, location of the foreign body and the complication of the operation. In 77.6% of the cases, the wound was on the cornea or limbus. That is one of the important factors to affect the patients' postoperation vision.