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A large FOV image is used as the reference frame for a narrow target image (brighter narrow image in foreground) for WFSLO eye tracking. A narrow target image increases the frame rate to ~51 fps during WFSLO driven optical stabilization. The narrow target image can be placed anywhere in the large reference image FOV, allowing target images to be optimized for cross-correlation by selecting an area with high contrast retinal features. Scale bar is 500μm.
