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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 femto on Wednesday November 09, 2022 @06:23AM (#33529948)
It's easy to do your own PD measurement with a mirror and ruler

https://news.ycombinator.com/item?id=33525673#33529513

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