Why are glasses so expensive? The eyewear industry prefers to keep that blurry

Re:Why are glasses so expensive? The eyewear industry prefer... by dotancohen on Wednesday November 09, 2022 @08:53AM (#33531593)

  > anti-glare, anti-scratch, spectrum, blue light filter

What does "spectrum" mean in this context? Thanks.

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Re:Why are glasses so expensive? The eyewear industry prefer... by andirk on Wednesday November 09, 2022 @04:49PM (#33538414)

Sorry the word is "prism", not spectrum.

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Re:Why are glasses so expensive? The eyewear industry prefer... by dotancohen on Thursday November 10, 2022 @03:17AM (#33543656)

Thanks. Now I just need to learn what prism means in this context ))

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Re:Why are glasses so expensive? The eyewear industry prefer... by LorenPechtel on Thursday November 10, 2022 @05:30PM (#33554522)

I believe it's tilting the lens relative to the frame.

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