For a "normal" and healty eye, the light most likely won't damage anything. However, there are several cases where people have refused further testing, due to a decrease in vision (permanent) after such light intensive tests. I can vouch for this myself, having experienced it personally. Any light in the blue spectrum is potentially harmful to any eye. Tests such as ERG and FA, are extremely stressful on your retinal cells (photostress). If you are light sensitive or have any other health issues that causes "abnormal" cell function, beware.
No the light exposure while having an FA is uncomfortable but not damaging. No UV
JCH MD