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過去9年間に眼瞼下垂手術を行った245症例につき,その原因を検討した。内訳は男性77例,女性168例であり,60歳以上が全体の75%を占めた。後天性眼瞼下垂の頻度は93%,先天性が7%であった。95例(39%)が両眼性,150例(61%)が片眼性であった。白内障手術の既往が52例(21%),顔面神経麻痺の既往が11例(4.5%)にあった。202例(82%)が老人性眼瞼下垂と診断された。以上の事実から,近年の眼瞼下垂には,人口の高齢化や内眼部手術の増加が関与している可能性があることを示している。高齢者の眼瞼下垂では,重症筋無力症などの神経筋疾患を鑑別することが必要である。
We reviewed 245 cases who received surgery for blepharoptosis during the past 9-year period. Particular attention was paid to causative factors. The series comprised 77 males and 168 females. About 75% of patients were aged 60 year or over. Blepharoptosis was congenital in 7% and was postnatal in 93% of the series. It was unilateral in 150 cases(61%)and bilateral in 95 cases(39%). History of cataract surgery was present in 52 cases(21%)and that of facial palsy in 11 cases(4.5%). Senile blepharoptosis was present in 202 cases(82%). These findings show that increase in senile population and intraocular surgery may be related to blepharoptosis in recent years. It is necessary to differentiate neuromuscular disorders,including myasthenia gravis,in the diagnosis of blepharoptosis in senile patients.
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