I went from -2.5 to -3.0 in less than two months =(

Discussion in 'Optometry Archives' started by Spockie, Feb 21, 2006.

  1. Spockie

    Spockie Guest

    I went from -2.5 to -3.0 in less than two months =(


    I was perscribed -2.5 in both eyes at walmart with acuvue advance.



    Now, i got -3.0 in both eyes from costco with acuvue oasys. Just great. =(
     
    Spockie, Feb 21, 2006
    #1
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  2. Spockie

    otisbrown Guest

    Dear Spockie,

    Congratualtions!

    In short order you can expect
    Neil Brooks to post warnings
    against you for making that statement,
    and then he will file a charge
    against you for giving "medical"
    advice.

    Best,

    Otis
     
    otisbrown, Feb 21, 2006
    #2
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  3. Spockie

    acemanvx Guest

    your eyes are getting worse due to wearing a minus lens for all the
    near work you do. -3 contacts are as strong as -3.75 glasses for some
    people, including me. Ive warned you about this in the past but you
    dont care. I guess as a(extend) contact wearer, you only "see" your
    blurry vision once a month for a few minutes, the rest of the time,
    your contacts are in.
     
    acemanvx, Feb 21, 2006
    #3
  4. Spockie

    CatmanX Guest

    Can you show me the math for this calculation? I calculate -3.00 in
    CL's is -3.00 in glasses, but heck, my optometry degree isn't worth
    much, or so the engineers keep telling me.

    Spockie, you may find that either the first or second test may have the
    wrong answer. _0.50 does not usually occur in 2 months.

    dr grant
     
    CatmanX, Feb 21, 2006
    #4
  5. Spockie

    acemanvx Guest

    http://www.preventmyopia.org

    All your infomation is there. Minus lens combined with close work is a
    recipe for rapidly increasing myopia. This explains why many college
    students become myopic or have their myopia increase.


    "Can you show me the math for this calculation?"


    The math means nothing because contacts behaive differently for
    different people's eyes. The average is 1.25 times so you multiply -3
    contacts by 1.25 and you get -3.75 in glasses. My friend wears -3
    contacts but her -3 glasses are too weak. Shes going to the optometrist
    to get -3.75 glasses. Another lady wears -4.25 and -4.75 contacts but
    shes -5.25 and -6 in glasses. Theres several factors that determine
    what contact lens power the person needs. You can not directly convert
    as each person may be different. I was told I needed -4.75 contacts for
    my -5 glasses pescription. This would overcorrect me by a diopter to a
    diopter and a half. The -3.25 contacts I have correct me about as well
    as my -4.25 glasses.
     
    acemanvx, Feb 21, 2006
    #5
  6. Spockie

    CatmanX Guest

    You are so full of shit. The maths is everything. There is no 1.25
    multiplier. Go back to your room and jerk off.

    You also know you have no friends, so stop making them up.

    dr grant
     
    CatmanX, Feb 21, 2006
    #6
  7. Spockie

    acemanvx Guest

    acemanvx, Feb 22, 2006
    #7
  8. Spockie

    CatmanX Guest

    Yes, the scripts were wrong in the first place.

    dr grant
     
    CatmanX, Feb 22, 2006
    #8
  9. Spockie

    acemanvx Guest

    I think my optometrist would know what he was doing when he pescribed
    me. Many of my friend's glasses pescriptions are 1.25 times higher than
    their contacts. read about vertex distance and get back to me.
     
    acemanvx, Feb 22, 2006
    #9
  10. Spockie

    Neil Brooks Guest

    > wrote

    Ace,

    I'm a little confused here and I presume you can help me:

    - What is the actual vertex distance for measurements taken
    using a phoropter?

    - What is the actual vertex distance for measurements taken
    using a trial frame?

    - Given a high sphere Rx, with astigmatism, does it matter
    which lens sits in which slot in a trial frame? If so, can you please
    explain the appropriate technique?

    - Given an actual vertex distance measurement, can you please
    walk me through the math used to calculate contact lens power?

    - Does that math differ if the lens being prescribed is an RGP
    vs. a toric soft vs. a non-toric (spherical) soft?

    Thanks. This will be useful information for me.
     
    Neil Brooks, Feb 22, 2006
    #10
  11. Spockie

    acemanvx Guest

    answers below are from a patient's point of view.



    - What is the actual vertex distance for measurements taken
    using a phoropter?

    As a patient, I was told to look into the phoropter with my chin
    resting and my head fully touching the metal. Some people sit back an
    inch or two and the vertex distance results in them getting more minus
    than they need. Its important the distance from any lens is equal.


    - What is the actual vertex distance for measurements taken
    using a trial frame?

    should be exactly the same as the vertex distance your pescription
    glasses are.



    - Given a high sphere Rx, with astigmatism, does it matter
    which lens sits in which slot in a trial frame? If so, can you please
    explain the appropriate technique?


    The highest power lens sits closer to your eye. If not, the vertex
    distance would throw results off. The cylindar lens sits in front where
    the optometrist can notice the axis.


    "- Given an actual vertex distance measurement, can you please
    walk me through the math used to calculate contact lens power?"


    Use 1.25 times for vertex distance. My optometrist gave me -4 trial
    lens. I was a -5 in glasses. However you still have to confirm using an
    over-refraction. Different eyes will react differently to contacts but
    many young people need 1.25 times higher glasses vs. contacts. I speak
    for this result as a patient and the fact my friends have glasses
    pescriptions 1.25 times higher than their contacts. Some people may
    stray from the 1.25x formula due to dry eyes, strange accomodation,
    steep or flat corneas, etc. ALWAYS do an overrefraction!


    "- Does that math differ if the lens being prescribed is an RGP
    vs. a toric soft vs. a non-toric (spherical) soft?"

    I talked to an optometrist on the phone and when I told him I am -5 in
    glasses, he said he will first try -4.5 RGP contacts. If they are too
    strong, he will try a lower power(I lose $300 each time) till the
    desired pescription is arived. For non torics, you dont want to give
    them to anyone with more than a diopter of astigmastim as this will
    hurt BCVA and strain the eyes. Spherical equivalent attempts to
    overcorrect you to compenstate for cylindar. Basically make you +.5
    diopters sphere if your cylindar is -1 diopters. Some people dont mind
    this over the discomfort of torics. You may want to let the patient try
    both torics and non torics and let him choose which one he prefers.



    Answers from a patient. Any other questions?
     
    acemanvx, Feb 23, 2006
    #11
  12. Spockie

    CatmanX Guest

    Hey dickhead, you have been told by at least 4 optoms here you are
    wrong. What does it take for you to listen?

    Now **** off and go to bed you little wanker.
     
    CatmanX, Feb 23, 2006
    #12
  13. Spockie

    CatmanX Guest

    Hey dickhead, you have been told by at least 4 optoms here you are
    wrong. What does it take for you to listen?

    Now **** off and go to bed you little wanker.
     
    CatmanX, Feb 23, 2006
    #13
  14. Spockie

    acemanvx Guest

    I guess you should see me and my friends who need 1.25 times higher
    glasses pescription than contacts. I was -5 in glasses, -4 in contacts.
    My friend is -3 in contacts, -3.75 in glasses. Another is -2 in
    glasses, -1.75 in contacts.
     
    acemanvx, Feb 23, 2006
    #14
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