Does anybody have any tips or procedures that have stood the test of time for accurately neutralizing an RX on a standard pprogressive lens with a manual lensometer. Other than marking the lens, and checking the center the distance and near reference points, what else should be done. I was never really properly trained in this area.

For instance, when I usually check the DRP, the intersection of the mires are usually below the center of the reticles, sometimes almost out of sight. Do you just raise the tray until the mires are centered in the reticles? And if that is done, when you check the other lens what happens if the mires are not centered again?

Also, what is the proper use of the auxillary prism ring in neutralizing a progressive lens? When initialing neutralzing the lens, do you twist the knob until the mires come centered? And if so, when you check the other lens, shouldn't it be centered?

Furthermore, how does induced prism affect checking the RX. What about high cyl, sphere power? Any input would be greatly appreciated. Thanks guys