手術を施行した片眼先天眼瞼下垂症例の視機能の検討

Postoperative visual function in cases of congenital unilateral blepharoptosis

要約　目的：手術を行った片眼の先天眼瞼下垂での斜視と視機能の報告。対象：過去5年間に手術を行った片眼先天眼瞼下垂42例を対象とした。男児23例，女児19例，年齢は0～15歳（平均5.5±3.5歳）であった。結果：術前の視力には，健眼と下垂眼とで有意差があった。下垂眼の19％に弱視があり，不同視弱視が多かった。57％に斜視があり，下斜筋過動と外斜視が多かった。乱視については健眼と下垂眼とで有意差がなかった。結論：片眼眼瞼下垂では弱視が発症する可能性が大きく，早期治療が望まれる。屈折異常があれば，術前でも屈折矯正を行うべきである。

Abstract.　Purpose：To report the visual function and ocular motility following surgery for congenital unilateral blepharoptosis. Cases：This retrospective study was made on 42 cases who underwent surgery for congenital unilateral blepharoptosis in the past 5 years. The series comprised 23 males and 19 females. The age ranged from zero to 15 years,average 5.5±3.5 years. Results：Visual acuity before surgery was statistically different between affected and fellow eyes. Amblyopia,particularly anisometropic one,was present in 19％ of affected eyes. Strabismus was present in 57％ of cases,particularly exotropia or overaction of inferior oblique muscle. There was no difference between affected and fellow eyes regarding astigmatism. Conclusion：Patients with congenital unilateral blepharoptosis have a high risk of amblyopia and need early treatment. Cases with anomalous refraction need early correction even before surgery.