What should I get?

Discussion in 'Optometry Archives' started by ali.alsafi, Feb 21, 2007.

  1. ali.alsafi

    ali.alsafi Guest

    Hi,

    Sorry if this sounds familiar. I have 3 prescriptions from three
    different opticians within the last 12 months here they are:

    First Test: Jan 06

    Right Eye:
    Sphere: -1.00 , Cyl: +1.50 , Axis: 85
    Intermediate: +0.75 Near +1.50
    Left Eye :
    Sphere: -0.50 , Cyl: +1.25 , Axis: 95
    Intermediate: +0.75 Near +1.50


    Second Test: April 06

    Right Eye:
    Sphere: -1.25 , Cyl: +1.50 , Axis: 70
    Intermediate: +0.75 Near +1.50
    Left Eye :
    Sphere: -0.75 , Cyl: +1.00 , Axis: 85
    Intermediate: +0.75 Near +1.50

    Last Test: Feb 07

    Right Eye:
    Sphere: +1.00 , Cyl: +1.50 , Axis: 175
    Intermediate: +0.75 Near +1.50
    Left Eye :
    Sphere: +0.75 , Cyl: -1.25 , Axis: 2.5
    Intermediate: +0.75 Near +1.50

    I am 46 years old and I use the VDU over 10 hours a day. Currently, I
    am still using my 4 year old pair of glasses (don't ask why) which are
    a single vision zeiss lenses that I had these prior to getting a
    varifocal prescription.

    Are the differences between these 3 Rxs a lot or is it normal over
    such a period? I have never used a varifocal glasses before and
    slightly concerned that I may not be able to adjust easily especially
    when using the VDU.

    So, I am seriously thinking of getting a single vision glasses for VDU
    use only and then possibly a multifocal / varifocal pair to be used as
    a backup and for reading & distance.

    If I am going to order a single vision glasses solely for VDU use from
    a mail order company then do I just quote say the latest Rx with an
    Intermediate Add value?

    Many thanks for your time and I welcome your general advice or other
    viable alternatives?

    Regards

    Al
     
    ali.alsafi, Feb 21, 2007
    #1
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  2. ali.alsafi

    otisbrown Guest

    Dear Al,


    If I am going to order a single vision glasses solely for VDU use
    from
    a mail order company then do I just quote say the latest Rx with an
    Intermediate Add value?

    Many thanks for your time and I welcome your general advice or other
    viable alternatives?

    Otis> This is a public forum, so when you say "general advice" -- that
    is what you are going to get.

    Otis> I am an engineer.

    Otis> Your "prescriptions are close to "plano".

    Otis> You might get a Snellen and see what your visual acuity
    actually is.

    Otis> While you show an "astigmatism" cut, you may
    find you can use a "spherical lens" for most application.

    Otis> Rather than messing around with varifocal glasses (they
    give some people a headache), you might try a
    comfortable +1.5 diopter lens (for computer work)
    in the store. That might be a more comfortable solution
    for your presbyopia. You probably do not need
    glasses for distance, given the "plano" type
    of prescription you have posted. The critical
    issue is whether you pass the DMV with no glasses.

    Otis> Just one engineer's opinion.


    Regards


    Al
     
    otisbrown, Feb 21, 2007
    #2
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  3. ali.alsafi

    Neil Brooks Guest

    Neil Brooks, Feb 21, 2007
    #3
  4. ali.alsafi

    otisbrown Guest

    Dear Al,

    Your other question was about "comparing" the refractive
    power of these three prescriptions, and I would prsume,
    your naked eye visual acuity. (i.e., DMV test).

    To compare them it is a good idea to reduce them
    to "Spherical Equivalent".

    You do this by taking the "Sphere" and adding
    1/2 the Cyl.

    As follows:


    Last Exam:

    Right Eye:
    Sphere: +1.00 , Cyl: +1.50 ,

    Sphere Eqi = 1 + 0.75 = +1.75 diopters


    Left Eye :

    Sphere: +0.75 , Cyl: -1.25 ,

    Sphere Equ = 0.75 - 0.62 = + 0.13 diopters. (Effectively plano)

    This suggests that you could probably pass the
    standard DMV test which required the reading
    of letters 3/4 inch high at 20 feet.

    A +1.5 diopter "add", (which you could get
    over-the-counter) or from Zennioptical.com
    would probably meet your requirements.

    Just one engineers opinion.

    Otis
     
    otisbrown, Feb 21, 2007
    #4
  5. ali.alsafi

    A Lieberma Guest

    Dear Al,

    Please disregard Otis's postings. He is not in the medical profession and
    not in any position to give medical advice.

    Thanks!

    Allen
     
    A Lieberma, Feb 22, 2007
    #5
  6. ali.alsafi

    myopiacure Guest

    Medical Advice = Calling another person's advice worthless and repeat
    that person's advice

    Read the post titled "contacts for extreme myopia and near work."

    Wearing bifocal contact lenses and wearing reading glasses over
    contact lenses (what I suggested) are pretty much the same thing!!

    Reading far and reading very close with reading glasses are the SAME
    thing!!!

    I thought you said reading glasses is wortless!!
     
    myopiacure, Feb 23, 2007
    #6
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