From: Evaluation of Time Domain and Spectral Domain Optical Coherence Tomography in the Measurement of Diabetic Macular Edema Invest. Ophthalmol. Vis. Sci.. 2008;49(10):4290-4296. doi:10.1167/iovs.08-2113 Figure Legend: Systems of retinal sampling used by the Cirrus HD-OCT and Stratus OCT systems (Carl Zeiss Meditec, Inc., Dublin, CA). Shown are the different sampling methods for the Cirrus HD-OCT (left) and the Stratus OCT (right). Cirrus HD-OCT samples significantly more points that are evenly distributed over the macular grid, whereas Stratus OCT samples points along six radial lines that intersect at the center of the macular grid. Date of download: 12/25/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.