> My ophthalmologist claimed he didn’t have the equipment to add PD to his presc... | Hacker News

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		JustSomeNobody on Nov 9, 2022 \| parent \| context \| favorite \| on: Why are glasses so expensive? The industry prefers... > My ophthalmologist claimed he didn’t have the equipment to add PD to his prescription. It's called a PD Ruler and it's literally just a mm ruler. Bald-faced liar indeed.

LorenPechtel on Nov 10, 2022 | [–]

They usually have a machine that reads it a bit more accurately.

selcuka on Nov 10, 2022 | [–]

Correction: "the equipment to add PD to his prescription" is called a pen.

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