Citation: Mohler KJ, Draxinger W, Klein T, et al. Combined 608 wide-field choroidal thickness maps and high-definition en face vasculature visuali-zation using swept-source Megahertz OCT at 1050 nm. Invest Ophthalmol Vis Sci. 2015;56:6284–6293. PURPOSE. To demonstrate ultrahigh-speed swept-source optical coherence tomography (SS-OCT) at 1.68 million A-scans/s for choroidal imaging in normal and diseased eyes over a ~608 field of view. To investigate and correlate wide-field three-dimensional (3D) choroidal thickness (ChT) and vascular patterns using ChT maps and coregistered high-definition en face images extracted from a single densely sampled Megahertz-OCT (MHz-OCT) dataset.