Lens thickness

Discussion in 'Optometry Archives' started by James Smith, Oct 4, 2004.

  1. James Smith

    James Smith Guest

    Is a prescription is -5.75 and a frame is 54mmacross (bridge to arm) and
    26mm high, what would the estimated edge thickness be with

    a) standard lenses
    b) 1.6 index
    c) 1.67 index
     
    James Smith, Oct 4, 2004
    #1

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  2. James Smith

    James Smith Guest

    The frame states size as: 53x20-140 if that helps
     
    James Smith, Oct 4, 2004
    #2

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  3. James Smith

    Carl E Eriksson Guest

    How can you calculate this without knowing the width of the bridge and
    the pd?

    Carl
     
    Carl E Eriksson, Oct 19, 2004
    #3

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