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  • refractive index

    From RichD@21:1/5 to All on Mon Nov 27 13:51:14 2023
    I visited an opthol... an eye doctor yesterday, he said
    I have a 1.5 refractive index.

    What does that mean, in opthol... eye medicine?

    --
    Rich

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  • From Joe Gwinn@21:1/5 to [email protected] on Mon Nov 27 18:29:36 2023
    On Mon, 27 Nov 2023 13:51:14 -0800 (PST), RichD
    <[email protected]> wrote:

    I visited an opthol... an eye doctor yesterday, he said
    I have a 1.5 refractive index.

    What does that mean, in opthol... eye medicine?

    The refractive index of pure water is 1.333 and of fused silica
    1.4585, so 1.5 would be difficult for an eye; these are more like
    1.40.

    In this context, an eye doctor probably means diopters.

    Joe Gwinn

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  • From Joe Gwinn@21:1/5 to [email protected] on Fri Dec 1 18:09:47 2023
    On Fri, 1 Dec 2023 15:02:36 -0800 (PST), RichD
    <[email protected]> wrote:

    On November 27, Joe Gwinn wrote:
    I visited an opthol... an eye doctor yesterday, he said
    I have a 1.5 refractive index.
    What does that mean, in opthol... eye medicine?

    The refractive index of pure water is 1.333 and of fused silica
    1.4585, so 1.5 would be difficult for an eye; these are more like 1.40
    In this context, an eye doctor probably means diopters.

    Sounds like a case of jargonitis.
    Like, aberration has a handful of definitions -

    Could be. Maybe he said refractivity.

    Anyway, in ophthalmology they use only Newtonian (thin lens) Optics,
    where diopters are defined:

    .<https://en.wikipedia.org/wiki/Thin_lens>

    Joe Gwinn

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