Figure 1From: Dynamic curvature topography for evaluating the anterior corneal surface change with Corvis STThe result of preprocessing. The width of the image is 8.5 mm. And the image is one frame of the Corvis ST video with resolution of 200 × 576 pixels. a The original corneal Corvis ST image, b the gray image after artifacts removal, c phase symmetry-based image, d phase asymmetry-based image.Back to article page