Swept Source optical coherence tomography enables choroidal imaging and improves retina imaging in eyes with media opacities. Choroidal thickness is demonstrated to change with age and axial length and in particular diseases. This video presents particular choroidal layers, concentrating especially on the appearance of suprachodoidal layer and suprachoroidal space in different retinal diseases. Also shown are the exact delineation of choroidal nevi and differentiation between nevi and tumors.