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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4 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
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