A simple ruler is enough. I am wearing glasses for 30 years and I had the few pa...

AdrianB1 on Nov 9, 2022 | parent | context | favorite | on: Why are glasses so expensive? The industry prefers...

A simple ruler is enough. I am wearing glasses for 30 years and I had the few pairs with wrong PD, the next optometrist used a simple ruler and I am working with him for the past 20 years.