A member asked:

How to tell if pupillary distance is incorrect for glasses?

A doctor has provided 1 answer

Dot the lenses...: With a lensmeter, the optical center can be dotted with a marking pen, and compared to the actual interpupillary distance, which is always about 2 mm more than what is needed for reading glasses, due to convergence of the eyes at near.

Answered 10/10/2018

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