How important is it to have the optic nerve head centered?
It is very important to try to center the optic nerve head at each exam so that the exams may be easily compared over time. The effect of having the optic nerve head off-center in images compounds over time, reducing the data available to perform progression analysis. ——————————————————————————– An optic nerve head not centered properly may affect proper import of the contour-line on subsequent images. Manual alignment of HRT II and HRT3 images is available when an image is acquired that is off-center.
