Psychophysics and Visual Testing

Discussion in 'Optometry Archives' started by Thomas Hofmann, Nov 4, 2003.

  1. Hi Group

    Anyone having an idea where information can be gathered connecting
    Psychophysics and Visual Testing together? Meaning, which visual tests
    depict which treshold?

    Best thanks

    Thomas Hofmann
    Optometrist / Dipl. Augenoptiker SBAO
    Ophthalmic Photographer OPS

    CH-4053 Basel

    +41 79 7071429
    Thomas Hofmann, Nov 4, 2003
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  2. Thomas Hofmann

    Dr Judy Guest

    Which thresholds are you concerned about? I think you will have to hit the
    literature and search using the particular threshold as the key word. Do
    you have a university library nearby, the librarian can assist you in
    finding the psych, physics and medical databases. PubMed might work, but it
    likely does not have all the vision science journals.

    Finally, if you are thinking about clinical visual testing, I think you will
    find that clinical testing does not have the level of detail that
    experimental testing designs find.

    Dr Judy
    Dr Judy, Nov 4, 2003
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  3. Thomas Hofmann

    Francine Guest


    Hi Tom,

    What you are talking about, as Dr Judy said, is in the realm of
    laboratory "vision science." I've been collecting links about that
    kind of stuff and will look for it in my files, and post as soon as I
    solve the internet problem I've been having with my home computer.

    It WOULD help if you specified which particular stimulus threshold you
    are interested in.
    (posted from a cybercafe)
    Francine, Nov 5, 2003
  4. Dear Fran, Dear Dr. Judy

    Thank you for your answers. What I am trying to find is clinical vision
    tests like:
    Visual fields
    NRC, PRC
    PRA, PRC
    Stereo-depth testing
    Fused and unfused FD

    I want to link these tests with the concepts of difference treshold,
    absolute treshold, method of limits, method of constant stimuli and method
    of adjustment.

    I would appreciate a lot if you could provide me with helpful links.

    Hope I am being more clear now

    Best regards and many thanks

    ICQ Number : 345-266-319
    Thomas Hofmann, Nov 8, 2003
  5. Thomas Hofmann

    Francine Guest

    Hi Thomas,

    You might want to start with this:

    If you contact COVD or OEP they could tell you all you need to know
    about vision tests, as what you describe is part of a comprehensive
    eye exam:

    And you might want to take a look at:

    You can also join my newsgroup about Vision Training, where I have a
    folder listing a number of vision tests in the group files. I'm trying
    to become educated on the subject, myself.


    Francine, Nov 9, 2003
  6. Thomas Hofmann

    Dr Judy Guest

    You will have to go to the literature and seek out studies that looked at
    the validity and reliability of the clinical tests. You may find that no
    one has studied all those thresholds for all those tests. For fields and
    perimetry, there is lots of stuff as thresholds were studied extensively
    during development of the current instruments. PubMed only archives back
    to the late '60s, literature on some of those other tests goes back beyond
    that. If there is a medical school or optometry school nearby try their
    library, they will have older journals in situ or on microfiche. Their
    librarian can also show you how to use various vision research search
    engines and indexes.

    PubMed can be accessed via, but I really think
    you will need to do a physical not virtual search at a real library.

    Dr Judy
    Dr Judy, Nov 9, 2003
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