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Thread: photochromic or transition lenses

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    OptiBoard Novice Eyesforlife's Avatar
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    Thumbs up photochromic or transition lenses

    My apprentice optician asked me how photochromic/ transition lenses so I thought I'll share my knowledge here with those apprentices or newbies.

    Firstly UV coating should not be confused with photochromic treatment. Photochromic lenses are the type that darkens gradually when exposed to sunlight and return to normal when you go back indoors. The light-sensitive molecules inside photochromic lenses shift their structure when they're bathed in UV rays, allowing them to absorb more light and give the lenses a darkened appearance. Once the UV light goes away, the process reverses and the lenses become clear again.

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Of course the inquisitive apprentice now asks how UV filters are affecting these lenses, to which you reply...;)

    Welcome to Optiboard!!!
    Last edited by Uncle Fester; 03-19-2023 at 08:17 PM. Reason: tweak...

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