PosChang.txt


Subject:  Proving that a "protective" positive state can be
	  developed in the fundamental eye.


     From the study of the primate eye (in an open environment),
it is established that the range of NORMAL refractive states is
from zero to +2 diopters.

     This is consistent with C. Wildsoet's dynamic eye
concept (blue-tinted eye).  See:

http://vision.berkeley.edu/wildsoet/myopiaprimer.html

     Dr. Prentice established that when a plus lens is
properly used, distant vision will be cleared provided
the person's refractive state is less than -1.5 diopters,
or a Snellen reading of 20/70.  See below.


     =================================

     By Chalmer Prentice, M.D.

     Transcription (c) A.  Wik, 2004

     ----------+ | Chapter IX | +--------


     The following are some very interesting experiments in myopia
which can be verified by any operator, and which prove that
refractive myopia depends on ciliary spasm, and that, even in
axial myopia, considerable repression can sometimes be made at the
near point.  In either class of cases, repression must be made at
the near point.  In various lengths of time, we shall be able to
reduce the myopia one or two dioptres, sometimes more.	In most
cases satisfactory results will require considerable time and
patience; but a few experiments after the following example will
suffice to show that in some very advanced stages of myopia, it is
possible to suppress, or at least check, its onward course by
repression at the near point.

     This fact renders the fitting of minus glasses to myopic eyes
an open question.


     EXAMPLE CASES

     Age forty-three; myopia; had been wearing over the right eye
-1.25 D, left eye -1 D, with little or no cchange for the space of
two years; eyes in use more or less at the near point.	I
recommended the removal of the concave glasses for distant vision
and prescribed +3.50 D for reading, writing and other office work.

     After reading in these glasses for several days, the patient
was able to read print twelve inches from the eyes.  This patient
was of more than ordinary intelligence and understood the aim of
the effort.  In six months I changed the glasses for reading and
writing to a +4 D without seeing the patient.  After using the +4
D glasses for several months he again came under my care for an
examination, when the left eye gave twenty-twentieths of vision,
while the right eye was very nearly the same, but the acuity was
just perceptibly less.


      ++++++++++++++++++++++++++++++++++++++++++++++++++

     Similar results have been attained in 34 like cases;

     ...but the process is very tedious for the patients, and
unless their understanding is clear on the subject, it is almost
impossible to induce them to undergo the trial.

       ++++++++++++++++++++++++++++++++++++++++++++++++++


[Comment:  Anyone considering "prevention" must understand this
       issue.  There is no "easy way" of prevention.  As Chalmers
       said -- the person must fully understand this issue.  It is
       for this reason that I suggest full transfer of "control"
       to the person himself.  If he lacks the motivation to look
       at the chart, and "clear" himself, then no "third party"
       (i.e., OD) can do it for the person.  This is why I
       separate a true-medical problem from preventing a negative
       refractive status in the natural eye.  I believe that the
       above statement simply clarifies that point.  OSB]

[Comment:  We also have the "Neil Brooks" effect which must be
       understood.  (Read sci.med.vision to understand this effect
       on ANY OD.) A few people will SUE ANY OD WHO EVEN MENTIONS
       PREVENTION-WITH-PLUS.  For that reason, no majority-opinion
       OD will EVER help you with true-prevention -- and I don't
       blame them.  I would not put myself at risk either -- nor
       do I expect any majority-opinion to put himself at
       professional risk either.  But that is why you NEVER hear
       about the preventive effect of a plus -- if used correctly.
       Think about it.	OSB]