Purpose: To determine the value of anterior segment indocyanine green (ICG) angiography combined with anterior segment fluorescein angiography in scleral inflammation.
Design: Comparative observational case series.
Participants: The study included 18 patients with various forms of scleral and episcleral disease and a single normal subject.
Methods: Anterior segment angiography using both ICG and fluorescein was performed to identify any vascular abnormalities and pathologic changes in the anterior segment.
Main outcome measure: The pathologic criteria for anterior segment fluorescein angiography described by Watson and Bovey (1995) were used to compare and contrast the results of the angiograms.
Results: Fluorescein angiography and ICG angiography provide different and complementary information. Both dyes have different leakage patterns caused by their difference in optical and chemical properties. Areas of slow flow are more readily determined with fluorescein angiography. ICG angiography determines damage to and patency of individual vessels.
Conclusion: Fluorescein angiography and ICG angiography detect areas of damage not clinically visible and can be useful in the differential diagnosis, the selection of appropriate medication, and monitoring and regulation of treatment in scleritis. To obtain the most information both investigations should be performed sequentially.