Prevention - pseudomyopia/accommodative spasm

Discussion in 'Optometry Archives' started by Neil Brooks, Dec 17, 2006.

  1. Neil Brooks

    Neil Brooks Guest

    Safe ... effective ... proven. No risk of double vision. You can
    buy/make a corn/rice bag and microwave it....

    The effect of periocular warming on accommodation.

    * Takahashi Y,
    * Igaki M,
    * Suzuki A,
    * Takahashi G,
    * Dogru M,
    * Tsubota K.

    Department of Ophthalmology, Jikei University School of Medicine,
    Tokyo, Japan.

    PURPOSE: To investigate the effect of periocular warming on
    accommodation amplitude and near vision after prolonged near work in
    visual display terminal (VDT) workers in an office setting. DESIGN:
    Prospective interventional observational case series. PARTICIPANTS: Ten
    healthy Japanese male volunteers (mean age, 39.3+/-2 years [range,
    36-43]) with a best distance corrected visual acuity (VA) of >20/20 who
    performed near work for 7 hours were included in the study. MAIN
    OUTCOME MEASURES: The differences of subjective and objective
    accommodations, near acuity, and pupil diameters were compared and
    studied in 2 experimental settings with and without periocular warming.
    METHODS: Two experiments were performed on each subject on 2 different
    days. In one experiment, the subjects wore an eye mask and closed their
    eyelids for 10 minutes after 7 hours of VDT work (lid closure [LC]
    group). In the other experiment, the subjects applied warming sheets
    (WSs) to their eyelids and the periocular region and wore masks for 10
    minutes again after 7 hours of VDT work (WS group). Visual display
    terminal work was performed under the same settings on both days.
    Subjective and objective accommodations, near vision, and pupil
    diameters were measured immediately before and immediately after the
    resting or warming procedure and again 90 minutes after the resting or
    warming procedures. RESULTS: Fifty percent of eyes had an increase in
    the accommodation amplitude of at least 0.5 diopters immediately after
    application of the WSs. Forty percent of eyes still maintained the
    accommodation amplitude level at 90 minutes. The mean near logarithm of
    the minimum angle of resolution VA immediately after application of WSs
    and at 90 minutes significantly improved relative to the near acuity
    values after simple eyelid closure. CONCLUSION: Periocular warming was
    found to be associated with increases in subjective and objective
    accommodations, with a concomitant improvement in near VA. Periocular
    warming with disposable WSs is a simple and effective method of
    increasing near work-related ergonomy.
    Neil Brooks, Dec 17, 2006
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  2. Neil Brooks

    John H. Guest

    Yeah, the Bates people call it sunning and were ridiculed for the idea
    but when I tried it in my early 20's I presumed it was simply a way of
    heating the eyes, increasing blood flow da da but this below proves how
    often we can make the mistake of throwing out the ranting baby with the

    John H., Dec 19, 2006
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  3. Neil Brooks

    Neil Brooks Guest

    Where would you assume the accommodative amplitudes went,
    or--conversely--that the post-warming amplitudes came from?

    It seems a reasonable hypothesis that--since the periocular warming
    returns some AA--they were "locked up" in some kind of "short-term
    hypertonicity" (ie, cramp/spasm), no?
    Neil Brooks, Dec 19, 2006
  4. Neil Brooks

    Dr. Leukoma Guest

    They also measured pupil size. I would like to know if the pupil size
    changed. If it got smaller, it may have resulted in a slight increase
    in depth of field.
    Dr. Leukoma, Dec 19, 2006
  5. Neil Brooks

    Ann Guest

    From what I understand, Bates was claiming to cure myopia which is a
    whole different ballgame from pseudomyopia.

    Ann, Dec 23, 2006
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