3主病型以外の水晶体病変有所見率：Monzen Eye Study

Prevalence of lens opacity types except three major ones in Monzen Eye Study

無作為に選んだ225名の一般住民を対象に，水晶体混濁の型別の調査を行った。全員が石川県門前町在住者である。男性101名196眼，女性124名246眼で，年齢は55～85歳（平均67.8±7.0歳）である。診断はすべて同一検者が散瞳下で行った。白内障の主要病型である皮質，核，後囊下混濁以外の水晶体混濁の頻度は，fiber folds（29.1％），water clefts（41.4％），vacuoles（21.2％），focal dots（28.6％），retrodots（22.5％），coronary cataract（11.5％）であった。Fiber folds，water clefts，retrodotsの頻度は加齢に伴って増加していた。皮質混濁がある眼の91％にはfiber foldsがあった。これら6型の水晶体混濁には視機能障害に関係するものがあるので，上記の結果は白内障の診断や疫学調査に考慮される価値がある。

We investigated the population-based prevalence of different types of lens opacity as a part of Monzen Eye Study. Randomly selected 225 persons participated in the study. The series comprised 196 eyes of 101 males and 246 eyes of 124 females. Their ages ranged from 55 to 85 years,average 67.8±7.0 years. Each subject was evaluated by one examiner under mydriasis through slit-lamp biomicroscope. Lens findings were also recorded by Scheimpflug Image System including slit-and retroillumination. Prevalence of the other six abnormal lens findings were：29.1％ for fiber folds,41.4％ for water clefts,21.1％ for vacuoles,28.6％ for focal dots,22.5％ for retrodots,and 11.5％ for coronary cataract. Fiber folds,water clefts and retrodots increased along with aging. Fiber folds were present in 91％ of eyes with cortical cataract. Since some of the above six lens changes are associated with visual impairment,present findings promise to be of value in the diagnosis of cataract and in epidemiological studies.