Prism changed from one eye to the other

Discussion in 'Eye-Care' started by k9oxon, Aug 28, 2005.

  1. k9oxon

    k9oxon Guest


    For the last five years (3 checks) I have had a prism included in my
    prescription (1 OUT in the LEFT eye). I have just had another
    eye-check (18 months after last check) and my new prescription shows
    the prism in the RIGHT eye, 1 OUT. On querying this, I have been told
    that for small variations it does not matter which eyeglass has the

    Is this a reasonable explanation? Also, as I always use my old glasses
    for occasional use, will the continuous swapping from right to left
    have any impact?

    Thank you for your views

    Regards Ron
    k9oxon, Aug 28, 2005
  2. k9oxon

    k9oxon Guest

    Very clear and reassuring. Thanks Mike
    k9oxon, Aug 28, 2005
  3. I slightly disagree, and tend to consider, in order of relative
    importance: If there is a strong dominancy, I tend to put the prism in
    the non-dominant eye. If there is a fixation disparity, I always ask
    if one eye's image is displaced more than the other. If so, I put it all
    in the deviating eye, if not, I split the prism equally between the two
    eyes. If one eye has better best corrected visual acuity, I will put
    all the prism in the less correctible eye. Finally, if one lens is
    stronger than the other, I tend to put the prism in the weaker lens,
    unless the prism will actually make either lens thinner.

    Other than those considerations, I agree it doesn't matter. Oh, except
    I would NEVER change the laterality of a prismatic correction without a
    reason to do so...

    w.stacy, o.d.
    William Stacy, Aug 29, 2005
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