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1994年から1999年の6年間に,硝子体手術を施行した眼内鉄片異物症例25例25眼(男性22例,女性3例)を対象に,術前の臨床所見,術後視力ならびに術後視力に影響する因子を調査した。受傷原因は草刈り機使用中が14眼(56%)と最も多かった。穿孔部位は,角膜が19眼(76%),強膜が6眼(24%)で,異物の所在は網膜が21眼(84%),硝子体内が4眼(16%)であった。術前合併症として白内障が18眼(72%),硝子体出血が16眼(64%)にみられた。術前視力0.01未満は15眼(60%)あったが,術後,13眼(52%)において1.0以上の視力を得た。術前視力,異物の大きさ,および術前の硝子体出血が術後視力の転帰に関係していた。
We reviewed 25 cases of intraocular metallic foreign body treated by pars plana vitrectomy dur-ing the past 6 years. The series comprised 22 males and 3 females. All were unilaterally affected. Power mower was the major cause of injury involving 14 eyes (56%). The foreign body penetrated the eyeglobe transcorneally in 19 eyes (76%) and transsclerally in 6 eyes (24%). The foreign body was located in the retina in 21 eyes (84%) and in the vitreous in 4 eyes (16%). Preoperative complications included traumatic cataract 18 eyes and vitreous hemorrhage 16 eyes. The preoperative visual acuity was 0.01 or less in 15 eyes (60%). The best corrected visual acuity was 1.0 or more in 13 eyes (52%) after surgery. The visual outcome was significantly correlated with preoperative visual acuity (p=0.007), size of foreign body (p=0.002) and pre-operative vitreous hemorrhage (p=0.001).
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