Yan ke xue bao = Eye science / "Yan ke xue bao" bian ji bu
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To determine the effects of extraction of intraocular magnetic foreign body with intraocular earth magnet (IOEM). ⋯ Intraocular earth magnet (IOEM) is a permanent magnetic instrument with moderate magnetic power. Direct observation and detachment of the foreign body with ocular tissue are necessary during the remowal of the forreign body. This instrument is suitable for intraocular microsurgery, can be handled easily, used for extraction of foreign bodies in anterior chamber, on turbid lens and in vitreous body, in removing foreign bodies in vitreous chamber with obvious injured retina and on posterior segment, the surface of retina, and can also be applied toextract foreign bodies on optic disk as well asforeign bodies partly oldged on global wall.