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A comment on Why are glasses so expensive? The eyewear industry prefers to keep that blurry. Parent comment

Re:Why are glasses so expensive? The eyewear industry prefer... by AdrianB1 on Wednesday November 09, 2022 @03:16AM (#33528693)
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.
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