Simplified photogrammetry of the optic disc
K. E. Schirmer
Simplified photogrammetry of the optic disc depends on axis-correct fundus
photography. The evaluation can be initiated by a time-based method of
photogrammetry that proves presence or absence of change of the object. The
degree of change can be simply measured by a telemetric device that permits
one to evaluate the third dimension from stereophotographs.