What is the average choroidal filling period on a Fluorescein Angiography?

The average choroidal filling period during a Fluorescein Angiography is typically around 10 to 20 seconds. This duration represents the time it takes for fluorescein dye to circulate through the choroidal vasculature following intravenous administration. Understanding the timeline is crucial for interpreting the images obtained during the angiography, as it helps in assessing the vascular dynamics and identifying any abnormalities in the choroidal circulation. The 10 to 20-second timeframe corresponds to normal physiological response times, aiding clinicians in diagnosing conditions such as choroidal neovascularization or choroidal circulation disorders, where deviations from this timing might indicate pathologies.