1. A method for propagating modifications to the segmentation of optical coherence tomography (OCT) volume data comprising: a. acquiring OCT volume data; b. segmenting the data to identify a surface within the OCT volume; c. displaying a first slice of the OCT volume data which includes at least a portion of the surface; d. accepting user modifications of the surface at one or more points with respect to the displayed first slice; and e. automatically modifying the segmentation over a propagation zone containing additional portions of the volume data based on the user modification to the first slice.