Help - differences in axis.....

Discussion in 'Optometry Archives' started by Alun, Feb 19, 2004.

  1. Alun

    Alun Guest

    Hi all,

    I got new glasses nine days ago. They didn't seem right at all but I
    thought I should persevere.

    But I've been finding my right eye feels strained and uncomfortable,
    and I'm really tired by 10 when I'm normally a real night owl.

    Also, I sense a bigger than usual difference in vision when I look
    through the right eye as opposed to the left - with my glasses on I
    mean.

    I went to the opticians today to talk to them. They checked the lenses
    for me and they did match my prescription. And they also checked that
    my prescription is the same as my last test 2 years ago and it is.

    However, he did mention a change in axis. I didn't pick up on it at
    the time but I still feel my glasses are not right and am now wearing
    my old prescription sunglasses from 2 years ago to get some feeling of
    relaxation for my eyes.

    My question is - what will a change in axis do? What does it mean?
    Sorry for bothering you folks but I know something is amiss and this
    is the only difference between my old and new spectacles.

    Could it be causing the discomfort I am feeling at the moment. Will
    asking my optician to ensure my right lens has the same axis as
    previous solve my problem?

    Many thanks

    Al
     
    Alun, Feb 19, 2004
    #1
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  2. Alun

    Otis Brown Guest

    (Alun) wrote in message
    Dear Al,

    Why don't you post the old and new prescriptions
    for review?

    Best,

    Otis
    Engineer
     
    Otis Brown, Feb 20, 2004
    #2
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  3. Alun

    Guest Guest

    One thing that most opticians or Dr's don't tell you is that error in
    making of the glasses is + or - .25 So that a Rx for say -3.5 could
    actually be -3.75 to -3.25 and when you had then checked, anything in
    that range of .5 would be considered "legal".

    If you take this the next step and add the other eye, says -3.5 for
    example and one comes out -3.25 and the other -3.75, you might have a
    perception that the -3.75 would see better. This is the extreme case,
    but perhaps something in between might be your situation.

    Have you seen the print out from what your glasses measured? Did they
    use the correct PD - that too will affect the measurement? Have you had
    them checked at another facility?

    Good luck, I know these things can be frustrating.
    Boe
     
    Guest, Feb 20, 2004
    #3
  4. Alun

    drfrank21 Guest


    Simply means that you have an astigmatism correction and the axis
    is just the "orientation" of the astimgatic error. Without knowing
    the amount of the overall astigmatism or the degree of change in
    the actual axis I can only tell you that usually small changes in the
    axis should not produce much adaptation. Obviously, larger changes
    will.

    frank
     
    drfrank21, Feb 20, 2004
    #4
  5. Alun

    Jan Guest

    Nonsens, the accepted tolerance is 0.125 dpt and to my knowledge and
    experience there is no manufactor that even ever reached this maximum
    tolerance.
    Such statements as made by you indeed realy are.
    Jan (normally Dutch spoken)
     
    Jan, Feb 20, 2004
    #5
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