contacts versus eyeglasses prescription

Discussion in 'Glasses' started by michael.b.taylor, Jun 10, 2006.

  1. Hello,

    I recently went to an eye center to get contact lens and an eyeglass
    prescription. The eyeglass prescription was:

    RE: -2.50 +0.25 145 (sph/cyl/axis)
    LE: -2.50 +1.25 020

    However, when I went to get my contacts prescription, they gave me two
    lenses with a different prescription. The left lens is a toric lens.
    The right lens is non-toric. I noticed when looking at the exterior
    packaging of the contact lens that the prescription for one of the lens
    was -1.25 and the other was -2.25. Thus, I believe the non-toric lense
    appears to be substantially weaker.

    I noticed almost right way that vision through the right lens is fairly
    blurry. However, they pushed me out the door without addressing this
    issue, and they're rmaking it hard to reschedule, claiming that your
    vision can be blurry to start with anyways. However, I find it hard to
    believe that the difference between the eyeglass and contact lens
    prescription could vary so greatly: -1.25 versus -2.50. Also, my eyes
    do not seem to be watering or reacting to the lense.

    Is it normal for there to be such a great difference? Should I push to

    michael.b.taylor, Jun 10, 2006
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  2. michael.b.taylor

    plpfoot Guest

    The toric lens would probably have five numbers on it. The -1.25 was
    the sphere. Soft contact lenses are written using minus cylinders
    making your prescription -1.25 -1.25 x 110. You did not see (or at
    least mention in your post) the other numbers. Toric contact lenses
    occasionally do not fit well on the initial fitting as they sometimes
    do not rotate in the anticipated direction. After a week of wear it is
    easier to tell if it is the right lens.

    plpfoot, Jun 10, 2006
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  3. If you convert your prescription to minus cyl. format, it would read:-

    R: -2.25/-0.25 X 55
    L: -1.25/-1.25 X 110

    You did not say what the cylindrical component was for the toric lens.

    Leaving out the cylinders of the right lens should cause only very slight
    bluring, Are you sure yo did not mix your lenses, that is Right on left and
    left on right?

    Go back to the Doc to sort it out.

    Roland J. Izaac
    Philip D Izaac, Jun 10, 2006
  4. michael.b.taylor

    LarryDoc Guest

    That is correct, although it is in fact THREE numbers, not five.

    -2.25 for the eye that had a spectacle Rx of -2.50 is certainly

    So, if those are the numbers on the packaging, then you're on the right
    Ted, it takes but a couple of hours, sometimes as little as a half hour
    for the lens to settle and then be able generate a new lens power which
    adjusts for the rotation. For a brand new lens wearers, I usually give
    it two days *if the first lens is reasonably close* to what I expect.
    For most folks, I like to have them back to re-check the powers later
    the same day if possible. Things go better for patients, and me ;-)
    when they get as close to immediate gratification as possible.

    LB O.D.
    LarryDoc, Jun 10, 2006
  5. michael.b.taylor

    plpfoot Guest

    Dear Larry:

    Don't neglect the base curve and diameter of the lens. Not all
    lenses specify these but you are incorrect, it is in fact FIVE numbers,
    not three. Read the label.
    plpfoot, Jun 16, 2006
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