Fluorescent infra-red angiography of the fundus oculi using indocyanine green dye

This article describes the infra-red fluorescent angiographic technique to study the choroidal circulation in normal and pathological conditions. The standard Zeiss fundus camera was modified to hold suitable excitation and barrier filters. The dye used was indocyanine green, which has been proved to be free from any untoward reaction and has less tendency to leak from the fenestrated choriocapillaris, unlike fluorescein. Results obtained in pathological conditions like temporal arteritis, choroidal naevus, malignant melanoma, and choroidal angiomas were better shown by this technique than by fluorescein angiography.