Patent ID: 7880751

Claim:
A computer-implemented method, comprising: projecting a plurality of reference images at a first area within a display unit, wherein each of the plurality of reference images represents a different state of an orthodontic condition to enable selection of one or more of the plurality of reference images that represent a patient's state of the orthodontic condition, wherein each of the plurality of reference images are projected in a same view, and wherein each different state represents a level of severity of the orthodontic condition; selecting a first reference image of the plurality of reference images on the display unit; projecting the first reference image at a second area within the display unit; selecting a second reference image of the plurality of reference images on the display unit; projecting the second reference image at the second area within the display unit such that a difference between the first reference image and the second reference image is displayed at the second area within the display unit; and toggling between projecting the first reference image and projecting the second reference image such that the first reference image is displayed in the second area for a first time period and the second reference image is displayed in the second area for a second time period, wherein the first time period and the second time period at least partially overlap.