Different eyeglass prescriptions - should I split the difference?

Discussion in 'Glasses' started by aleator, Jul 24, 2004.

  1. aleator

    aleator Guest

    I received two different eyeglass exams and prescriptions this week:

    R -250 -050 144
    L -225 -050 32

    OD -275 -050 165
    OS -275 -050 10

    Is there any reason I shouldn't basically take the average
    of the sperical correction and the Axis?
    Are small changes in the cylindrical axis even noticeable?

    Note: I currently wear
    R -275 0
    L -250 0
    (no cyl. correction)
    This lack of astigmatism correction is quite noticeable at night.
    aleator, Jul 24, 2004
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  2. aleator

    LarryDoc Guest

    If you feel not having the astig corrected is an issue, then the next
    question is how to interpret the cyl axis differences.

    Was the first one done with an automated refractor or using a phoroptor?
    If the answer is the last, then the practitioner apparently took the
    time to pin down the axis pretty carefully. If it is the former, it's
    just a machine and I would put more faith in the human-controlled

    Or, as you suggested, split the difference and choose X 155 and X 20. I
    rounded because it's rare that someone with so little astig would be
    sensitive to one or two degrees of axis shift, the answer to your second
    query. I'd probably keep the lower sphere power, as that is more
    consistent with your previous rx, perhaps increasing it - .12, but that
    also speaks to my next comment:

    Or, have it done again and do an average.


    Dr. Larry Bickford, O.D.
    Family Practice Eye Health & Vision Care

    The Eyecare Connection
    larrydoc at eye-care-contacts dot com (remove -)
    LarryDoc, Jul 24, 2004
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  3. aleator

    Mark A Guest

    I received two different eyeglass exams and prescriptions this week:
    In most states you will have a hard time having lenses made with the average
    unless one of the OD's re-writes the Rx for you.
    Mark A, Jul 24, 2004
  4. aleator

    aleator Guest

    I was planning on using 19dollareyeglasses, so I could order from them
    and change the cyl. correction. Getting 'one of each' and seeing
    which one seems better was also suggested as a solution.
    It still seems to me that a 20 degree difference is pretty significant
    aleator, Aug 4, 2004
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