The latest machine for eyeglasses prescriptions.

Discussion in 'Glasses' started by Peter Jason, Oct 23, 2007.

  1. Peter Jason

    Peter Jason Guest

    I heard the other day there was a new machine
    for eyeglass prescriptions.

    Evidently the patient looks into it at an
    object (say a small model house) and the
    machine determines from this just the type of
    glasses reqd.

    It can determine Cyl, Sphere & prism with
    just one zap.

    Has anyone heard of this, and can he supply a
    name so I can check it out?

    Please help, Peter
     
    Peter Jason, Oct 23, 2007
    #1
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  2. Peter Jason

    Neil Brooks Guest

    Autorefractor

    http://en.wikipedia.org/wiki/Autorefractor

    It's not new.
     
    Neil Brooks, Oct 23, 2007
    #2
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  3. Peter Jason

    Mark A Guest

    It is not as accurate as actually putting lenses in front of your eyes and
    asking which is better, 1 or 2. A lot of OD's use it to get a starting place
    for the exam.
     
    Mark A, Oct 23, 2007
    #3
  4. Peter Jason

    Peter Jason Guest

    message

    Thanks, why then are optometrists still using
    the old machine requiring manual selection of
    lenses?

    I have Sphere/Cyl adjustment and I get
    varying results from different optometrists.

    I have some friends back from overseas, and
    they order their glasses there because this
    "autorefractor" device gives excellent and
    automatic results.

    Peter
     
    Peter Jason, Oct 23, 2007
    #4
  5. Peter Jason

    p.clarkii Guest

    yeah. its called an autorefractor. they've been around for years.
    they don't control for accommodation on the part of the patient very
    well. for example, kids who are slightly farsighted oftentimes
    autorefract as myopes.

    they are nice to have as a reference or to help sort out cylinder axis
    but there's NOTHING better than a good manual ret.
     
    p.clarkii, Oct 23, 2007
    #5
  6. Peter Jason

    p.clarkii Guest

    because they are inaccurate.
    well you'd get WIDELY varying results from an autorefractor. they are
    getting better, but still they are inaccurate and serve only as a
    useful reference to a good manual refraction.
    in some Asian countries they will sell you glasses based soley on a
    autorefractor reading. bottome line is you'd end up with a lot of
    glasses laying around that don't work very well.
     
    p.clarkii, Oct 23, 2007
    #6
  7. Peter Jason

    Dr. Leukoma Guest

    I find it useful to think of it this way. An autorefractor measures
    the optics of the eye, and therefore what the eye sees. The
    subjective refraction measures what the patient sees, i.e. after brain
    interpretation.
     
    Dr. Leukoma, Oct 23, 2007
    #7
  8. Peter Jason

    lena102938 Guest

    Solution:

    Device first measures refraction and then t changes lenses in front of
    eyes and asks
    you "that better or that ?" like when you call you bank it asks you
    questions.

    To write software for that device - couple of weeks it will be done.
    It will do the job even better then OD, it can work slower then some
    women in the rush
    for grossery shoping
    How do you like that perspective?
     
    lena102938, Oct 23, 2007
    #8
  9. Peter Jason

    lena102938 Guest

    Then OD brainwash that brain like in case of that post about 13 old
    kid
    who are pushed into glasses with OD who wants more clients.
     
    lena102938, Oct 23, 2007
    #9
  10. Peter Jason

    Neil Brooks Guest

    Lena? Were you raped by an optometrist or other vision care
    professional?

    Seriously. Were you?

    If so, then ... wouldn't law enforcement and a psychologist's office
    be a more appropriate venue for your hatred than this forum?

    Ya' see: this forum is SCIENCE.med.vision. All you bring is wrath,
    scorn, hatred, bitterness, and resentment.

    No information.

    Time to seek professional help.
     
    Neil Brooks, Oct 23, 2007
    #10
  11. Peter Jason

    Bre Guest

    Do any of the big name opticians in UK / Ireland use that machine? I
    have only ever had to put the frames on where they slot in and out
    different powered lenses.
     
    Bre, Oct 30, 2007
    #11
  12. Peter Jason

    lena102938 Guest

    Why would you need something like that?
    Every OD's has "machine" which measures
    refraction automatically the name of "machine" is "auto
    refractor" (USA) or "auto refractometer"(some other countries)
    The receptionist who worked yesterday in the grocery story push just
    one button and device makes and prints the measurements (astigmatism,
    refraction, average ) . Also it measures parameters for contact
    lenses.
    Copy and paste - it is the prescription.
    If you are interesting you can ask about reading of the device.

    Then the OD looks on that printed "receipt" and sticks the different
    lenses.
    Around +0.5 -0.5 of what the devise printed.
    Another manipulation with one button devise.

    Easier even then your cell phone which has "menu".
     
    lena102938, Oct 30, 2007
    #12
  13. Peter Jason

    Dan Abel Guest

    I'm sure many of those places have such a machine. It's often used for
    brand new patients, those who have just had eye surgery and people who
    temporarily can't see. It gives the doctor a starting place for
    testing. Since they don't work well, no competent doctor would rely on
    them for issuing a reliable prescription. I've had one used on me
    twice, both times after eye surgery.
     
    Dan Abel, Oct 30, 2007
    #13
  14. Peter Jason

    lena102938 Guest

    Dan they use it every visit to OD
     
    lena102938, Oct 31, 2007
    #14
  15. Peter Jason

    Dr. Leukoma Guest

     
    Dr. Leukoma, Oct 31, 2007
    #15
  16. Peter Jason

    lena102938 Guest

     
    lena102938, Oct 31, 2007
    #16
  17. Peter Jason

    lena102938 Guest

     
    lena102938, Oct 31, 2007
    #17
  18. Peter Jason

    lena102938 Guest

    Mike, Mike It is absoluttely_absoluttely cool reference !
    It has much more then retinoscope description.
    Thanks
    Lena
     
    lena102938, Oct 31, 2007
    #18
  19. Peter Jason

    lena102938 Guest

    Mike, can you send me ref how to measure accomodation as precise as
    possible ?
     
    lena102938, Oct 31, 2007
    #19
  20. Peter Jason

    Neil Brooks Guest

    I think it's an appropriate time to warn you, Lena. If you start
    ACTUALLY learning about this stuff, then:

    1) You'll have to abandon many of your closely-held beliefs as
    unsupported and factually wrong,

    2) You'll probably start to view eye docs as pretty good people, and

    3) You and Otis will have NOTHING to talk about.

    Good luck.

    Neil
     
    Neil Brooks, Oct 31, 2007
    #20
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