Optical Coherence Tomography (OCT) and Angiography in Patients with Angioid Streaks

Abstract

Purpose To investigate the retinal and choroidal features of angioid streak by fluorescein angiography (FA), indocyanine green anigography (ICG-A) and optical coherence tomography (OCT). Methods We analysed 46 eyes of 23 patients with angioid streaks examined at our retina section between March 1998 and June 2000. Their mean age was 42.8 years (26–61 years). After a routine ophthalmological examination, OCT and simultaneous fluorescein and indocyanine green angiography (FA/ICG-A) were done. Color fundus photographs were also taken. Results A peau d'orange appearance and angioid streaks were more numerous and apparent with ICG-A than FA. In two eyes (4.3%), some streaks that were well visualized on FA were not visible on ICG-A. Twenty eyes (43.5%) had macular complications and 26 (56.5%) were normal. Occult choroidal neovascularization (CNV) was diagnosed by ICG-A. Nine eyes had occult, and 11 had classic CNV. Ruptures of Bruch's membrane were hypofluorescent in 20 (43.5%) and hyperfluorescent in 26 eyes (56.5%). Optic disc drusen were detected in both eyes of one patient (4.3%). Localized hyperreflectivity was thought to be due to calcium deposits. Conclusions Angioid streaks were visualized more clearly and in larger numbers by ICG-A than FA. However, in some cases streaks that were funduscopically and fluorescein angiogrpahically visible could not be seen by ICG-A. Occult CNV was detected by ICG-A. Some mottled areas were seen and more clearly visualized by ICG-A. Calcium deposits were observed as localized areas of hyperreflectivity on OCT. These findings indicate that fluorescein angiography, ICG-A and optical coherence tomography all provide supportive information for each other and can be used for either diagnosis or follow-up of those patients.