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Thread: Need a little help on

  1. #1
    OptiBoard Novice
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    Need a little help on

    Hello all pretty cool sight, im currently in school for ophthalmic dispensing. I need a some help on determining the thickest point and the thinnest point on a lens when just giving a prescription. My notes on this is a mess
    So how would i go about doing this say whats thickest point on a lens with a -2.50-1.25x90 percription?

  2. #2
    Underemployed Genius Jacqui's Avatar
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    it would be on the 180 line, thickness is dependent on lens size.

  3. #3
    Master OptiBoarder
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    The Power Cross is your friend!

    It is also known as the Optical cross.

    Here is astart!

    http://www.opticianworks.com/chapter2.html

  4. #4
    Master OptiBoarder
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  5. #5
    Master OptiBoarder
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  6. #6
    Master OptiBoarder
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  7. #7
    Master OptiBoarder
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    I suggest a little - One-on-One with the instructor to clear this up.

  8. #8
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    The Power Cross is your friend!

    It is also known as the Optical cross.

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