Imaging of the choroidal layer has been limited with the conventional commercial SD-OCTs. Enhanced depth imaging optical coherence tomography (EDI-OCT) is a modification of the standard spectral-domain OCT (SD-OCT) technique that enables better non-invasive imaging of the choroid. This review contains an introduction of EDI imaging technique and principles and summarizes the findings of EDI-OCT imaging in age-related macular degeneration.