Wearing of +/- lens actually causes conditions?

Discussion in 'Optometry Archives' started by Kory Postma, Aug 2, 2003.

  1. Kory Postma

    Kory Postma Guest


    Optom Vis Sci. 1991 May;68(5):364-8. Related Articles, Links

    Inducing myopia, hyperopia, and astigmatism in chicks.

    Irving EL, Callender MG, Sivak JG.

    School of Optometry, University of Waterloo, Ontario, Canada.

    Myopia and hyperopia have been produced in chicks by applying
    specially designed convex and concave soft contact lenses to the eyes
    of newly hatched birds. After 2 weeks of wear, the eyes develop
    refractive states equivalent in sign and amount (+8 and -10 D) to the
    lens used. However, the lenses produce an artificial hyperopic shift
    during the first week of wear due to corneal flattening. We have
    developed a new approach involving the use of goggles with hard convex
    and concave contact lens inserts placed between the frontal and
    lateral visual fields. Myopia and hyperopia (+10 and -10 D) can be
    produced within days (4 days for hyperopia and 7 days for myopia) if
    the defocus is applied from the day of hatching. We can also produce
    significant amounts of astigmatism (1 to 5 D) axis at 90 degrees and
    180 degrees by using cylindrical contact lens inserts. Although these
    last results are preliminary, they suggest that accommodation is not
    likely involved at this stage of refractive development because we do
    not believe that the accommodative mechanism can cope with cylindrical
    defocus. All spherical refractive errors produced using the goggle
    system appear to result from alterations in vitreous chamber depth.
    Kory Postma, Aug 2, 2003
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  2. Kory Postma

    Rishigg Guest

    Your medicine is all based on this: first test on an animal, then go on
    on men, and many things do not fit, but still the method remains the same.

    Is this scientific?
    Rishigg, Aug 3, 2003
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  3. Kory Postma

    Kory Postma Guest

    You have a point.

    A black point, remember this perfectly black and clear with your eyes
    open and you will be able to see better.

    PS - hehe, like that Rishi? ...
    Kory Postma, Aug 3, 2003
  4. Kory Postma

    Dr. Leukoma Guest

    If the fovea acts as a pinhole, and the solution is one of filtering out
    the extraneous sensory information, a pinhead should have perfect vision.

    Dr. Leukoma, Aug 3, 2003
  5. Kory Postma

    Jan Guest

    "Otis Brown" <> schreef in bericht

    Yes it does !!!!

    You have a choice:

    1. Believe Dr. Judy

    2. Believe Otis
    Jan, Aug 3, 2003
  6. Kory Postma

    Otis Brown Guest

    Dear Kory,

    I should correct Jan.

    You should believe in youself above all else.

    Your own judgment of objective facts, and your right
    of choice is of paramount importance.

    You will find "experts" contradicting "experts" in
    optometry. This is a normal course of events.

    When this happens on a very basic subject like
    determining the dynamic behavior of the fundamental
    eye the issue is pure science.

    How you determine to use your knowledge is up
    to you. You are old enough and wise enough
    to face and make this type of decision.

    Pilots have logged onto this site with -1.0 diopters
    myopia. When they found they only get
    no help, they realize that they have to do it

    They check THEIR OWN EYEs on their own eye chart.
    The work VERY HARD with a strong plus lens (intense commitment)
    The verify their ability to clear their distant vision
    (their focal status moves in a positive direction.)

    When they verify they can read 3/8 inch letters (under
    FAA conditions), then then go an pass the FAA test.

    While many can not do this (or honestly lack the motivation)
    the fact is that it has been accomplished.

    After this they don't bother with OD opinion any more.

    As the ODs on this site stated, when you figure out
    how to do this successfully yourself -- then don't
    bother them any more.

    Their minds are made up -- do not bother them with the facts.


    Otis Brown, Aug 4, 2003
  7. Kory Postma

    Rishigg Guest

    Otis Brown wrote:

    I agree with Otis with these points of course.
    Rishigg, Aug 4, 2003
  8. Kory Postma

    Kory Postma Guest

    Thanks for the enlightenment, I'm only now starting to realize this.
    Some people are so set in their ways that they are totally unwilling
    to try simple experiments.

    Maybe they fear the outcome if Bates methods were more widely known, I
    do not know...

    They are simple experiments but yet not a single one has "wasted"
    their time on them...

    Kory Postma, Aug 4, 2003
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