Figure 12.
Demonstration of motion artifact. A. The OCT instrument creates a raster pattern while scanning a selected region of the eye. The scan takes a finite amount of time, but if the patient doesn’t move the image produced (B) has no motion artifact. C. If during the scan the eye moves in the direction of the black arrow the portion of the eye scanned prior to the movement will not match that of the portion of the eye after movement as shown in D. Note the white line at the junction of the two images, which is created because at that intersection of images there is a loss of correlation.