. ICG angiographic evaluation of choroidal abnormalities associated with multifocalchoroidopathies

摘要

Fluorescein angiography (FA) has not been helpful in the study of the pathogenesis of choroidal diseases because of its limits in exploring the choroid. The introduction of indocyanine green angiography (ICGA) in the clinical practice has opened new frontiers in the field of chorioretinal diseases, and this technique has several advantages over FA. Indocyanine green shows 98% binding to plasma proteins, which accounts for the very slow leak through the fenestrated choriocapillaris. Moreover the absorption and fluorescence of the dye is in the near infrared, thus overcoming the screen formed by retinal pigment epithelium, exudates, haemorrhages and opaque ocular media. These characteristics of ICG, together with the recent development of digital high resolution videoangiography, have led to great improvements in the imaging of the choroid1. Multifocal choroidopathies (MC) have benefited to a great degree from this new technique2-4. The purpose of our study is to report the ICG angiographic findings in MC.