You can use the lensometer to help find the pupillary distance of the lenses.

Name: You can use the lensometer to help find the pupillary distance of the lenses.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

A lensometer can help you to determine the pupillary distances of the lenses.
When you spot the centers of each lens in the lensometer, take the frames out of the lensometer, and using your PD ruler, measure the distance between the spots on both lenses. This will give you the distance PD measurement.

You Can Use the Lensometer to Help Find the Pupillary