受傷1年以上経過後に摘出した7mmの眼内鉄片異物の1例

An intraocular iron foreign body of 7 mm in length removed one year after injury

要約　目的：長さが7mmの鉄性眼内異物を1年以上後に摘出した報告。症例：29歳男性が釘打ち作業中に右眼に異物感を感じた。近医を受診したが，そのまま放置していた。それから15か月後に右眼視力低下で受診した。所見と経過：矯正視力は右0.3，左1.2で，眼圧は正常であった。右眼に白内障，眼球鉄錆症，眼底の上方に鉄片異物があった。白内障手術，硝子体切除，異物摘出を行った。異物は長さ7mmの棒状で，全面が半透明の被膜で覆われ，網膜と強く癒着していた。術後2か月で視力は1.2に回復した。結論：大きな眼内異物が陳旧化しても，手術により良好な結果が得られることがある。

Abstract.　Purpose：To report a case of iron foreign body retained in the eye and removed one year later. Case：A 29-year-old male felt a foreign body sensation in the right eye when working with a hammer and nail. He visited a local physician but received no treatment. He visited us 15 month later for failing vision in the right eye. Findings and Clinical Course：His corrected visual acuity was 0.3 right and 1.2 left. Intraocular pressure was within normal range. The right eye showed cataract,siderosis,and a foreign body in the superior fundus periphery. The right eye was treated by lensectomy,vitrectomy,and removal of foreign body. The foreign body was a nail 7 mm in length. Its whole surface was covered by semitransparent membrane and was firmly adherent to the retina. Visual acuity improved to 1.2 two months later. Conclusion：This case illustrates that recovery of vision is possible even after intraocular retention of a large foreign body over a prolonged period.