日本人の角膜鉄線発生率

Incidence of iron line in the cornea in the Japanese

要約　目的：Hudson-Staehli's lineで代表される角膜鉄線の日本人での頻度の報告。対象と方法：外来の初診患者3,008名を検索した。内訳は男性1,395名，女性1,613名である。細隙灯顕微鏡（ZEISS SL130）付属のCCDカメラで角膜を動画として撮影した。結果：典型的なHudson-Staehli's lineは男性36名と女性26名，角膜片雲の影響を受けたその亜型は男性49名と女性11名，Stocker's lineは男性4名と女性2名，Fleischer's ringは男性3名の総計131名（4.4％）にあった。発生率は加齢とともに増加した。結論：日本人の角膜鉄線の頻度は4.4％であった。従来の海外の報告と比較し，頻度がずっと低いこと，年齢とともに増加すること，男女差があることで大きく異なる。

Abstract.　Purpose：To report the incidence of iron line in the cornea in Japanese patients. Cases and Method：This study was made on 3,008 outpatients. The series comprised 1,395 males and 1,613 females. The cornea was video-photographed by a CCD camera attatched to a slitlamp biomicroscope（ZEISS SL130）. Results：Typical Hudson-Staehli's line was present in 36 males and 26 females. Atypical line with corneal opacity was present in 49 males and 11 females. Stocker's line was present in 4 males and 2 females. Fleischer's ring present in 3 males. Corneal iron line was thus present in 131 patients（4.4％）. The incidence increased with advance of age. Conclusion：Corneal iron line in the Japanese differed from that in Caucasians because of very low incidence, preponderance of males, and tendency to increase along with age.