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−6diopter以上の近視を有し,後極部眼底病変を有する8例15眼において,トプコン社製50IAにて,フルオレセイン螢光眼底造影(以下fluo螢光造影)とインドシアニングリーン螢光眼底造影(以下ICG螢光造影)を施行した。ICG螢光造影では斑紋状網脈絡膜萎縮巣と一部のびまん性網脈絡膜変性部で脈絡膜血管の消失を認めた。斑紋状網脈絡膜萎縮部に残存する脈絡膜血管は,fluoとICG螢光造影間で描出像に差がみられ,前者ではより浅層の脈絡膜血管を描出していると考えられた。またfluo螢光造影にて螢光漏出のみられない部位に,ICG螢光造影上後期にわたって脈絡膜螢光の非常に強い部位がみられる症例も存在し,網膜色素上皮下ないし脈絡膜内での血管新生が示唆された。
We performed indocyanine green (ICG) fundus angiography in 15 eyes of 8 cases with high myopia of -6 diopters or more. We used fundus camera 50 IA by Topcon. We observed disappearance of chor-oidal vessels in areas of choroidal patchy atrophyand of chorioretinal degenerations. In areas of patchy atrophy, there were occasionally remnants of choroidal vessels located deeper in the choroid than shown by conventional fluorescein angiogra-phy. There was an eye of high intensity of fluores-cence persistent throughout the late venous phase without manifest dye leakage. This finding was suggestive of occult choroidal neovascularization. ICG angiography thus supplied more accurate infor-mations concerning the disturbed state of circula-tion in high myopia.
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