加齢および顔面神経麻痺による眼瞼下垂への手術の視野面積と緯度への影響

Influence of surgery for blepharoptosis due to aging or facial palsy on the size of visual field

要約　目的：眼瞼下垂に対する眼瞼挙上術が視野の面積と主要8経線の長さに及ぼす影響の報告。対象と方法：過去1年間に手術を行い，その前後に視野を測定できた29眼を対象とした。男性12眼，女性17眼であり，年齢は56～91歳（平均73歳）であった。Goldmann視野計のV4視標を使い，術前後の視野面積と8経線の長さを，解析ソフトで測定した。結果：手術後の視野面積は，術前に比べ平均1.29倍に広くなった（p＜0.05）。術後視野の経線の長さは，術前よりも鼻側1.09倍，上鼻側1.26倍，上方1.26倍，上耳側1.74倍，耳側1.31倍といずれも有意に広くなった（p＜0.05）。結論：眼瞼下垂に対する眼瞼挙上術により，視野面積と水平方向を含めた上方経線に沿う視野の長さが有意に拡大または広くなった。

Abstract.　Purpose：To report changes in the size of visual field after surgery for blepharoptosis. Cases and Method：This study was made on 29 eyes that received ptosis surgery during a one-year period and that could be evaluated for visual field before and after surgery. The series comprised 12 male and 17 female eyes. The age ranged from 56 to 91 years, average 73 years. Visual field was measured by Goldmann perimeter. The isopter for V4 was evaluated as to the area and the radius for each 8 principal meridians. Results：The area of visual field increased to 1.29 fold after surgery. The change was significant（p＜0.05）. The radius increased significantly in the upper 5 meridians including horizontal one（p＜0.05 each）. Conclusion：Surgery for blepharoptosis induced enlargement in area of visual field and in radius of horizontal and superior principal meridians.