視野の加齢性変化

Influence of ageing on kinetic visual field

要約　目的：動的視野の加齢による変化の報告。対象と方法：65歳以上の68症例につき，Goldmann動的視野を測定した。水晶体の加齢による影響を除外するために，全例が白内障手術を受けていた。症例を65歳以上で75歳未満の前期高齢者群12例，75歳以上で85歳未満の後期高齢者群38例，85歳以上の超高齢者群18例に振り分けた。年齢が27～49歳，平均41歳で，有水晶体眼で白内障がない青壮年者群18例を対照として，結果を比較した。視野として，Ⅰ-4とⅠ-2イソプタの面積をコンピュータで測定した。結果：青壮年者群では，他の3群よりも視野が広かった。前期高齢者群では，後期または超高齢者群よりも視野が広かった。後期高齢者群と超高齢者群の問には視野面積に差がなかった。結論：白内障手術を受けた65歳以上の高齢者の視野面積は，有水晶体眼で白内障がない49歳未満の青壮年者よりも狭かった。85歳を境とする後期高齢者と超後期高齢者とでは視野面積に差がなかった。

Abstract.　Purpose：To report differences in the area of kinetic visual field in senile and younger persons. Cases and Method：Kinetic Goldmann perimetry was performed on 68 eyes of 68 persons over 65 years of age. All had past history of cataract surgery. They were divided into 3 groups：12 eyes between 65 and 75 years, 38 eyes between 75 and 85 years, and 18 eyes above 85 years. Findings were compared with those in 18 eyes of 18 adults. These 18 eyes were phakic and free of cataract. The age ranged from 27 to 49 years, average 41 years. The isopters for Ⅰ-4 and Ⅰ-2 were measured using a computer. Results：Area of visual field was significantly larger in phakic adults below 49 years of age than in those over 65 years. Among persons over 65 years of age, visual field was larger in those under 75 than over 75 years. Among persons over 75 years of age, there was no difference in visual field between those under than over 85 years. Conclusion：Area of kinetic visual field was smaller in persons over 65 years of age than in those under 49 years. Among persons over 75 years, there was no difference in the area of visual field between those under and over 85 years.