Re: Why incompetent bifocal studies fail.

On Jul 29, 1:33 am, Dr Judy <mpac...@xxxxxxxxxx> wrote:
On Jul 27, 11:21 pm, "otisbr...@xxxxxx" <otisbr...@xxxxxx> wrote:

We know the risks of an over-prescribed minus. (Massive body
of scientific facts and data.)

Please provide human clinical trial that supports your statement of
the risks of minus lenses.

Dr Judy

No reply. No surprise. Here are two human studies wherein non myopic
subjects wore truly overprescribed minus (up to -4 too much minus) for
up to 7 years and "gasp"

DID NOT BECOME MORE MYOPIC OR PROGRESS MORE THAN NON WEARERS!!!!!

PubMed citation number: 10326961

"Does overcorrecting minus lens therapy for intermittent exotropia
cause myopia?Kushner BJ.
Pediatric Eye and Adult Strabismus Clinic, Department of Ophthalmology
and Visual Sciences, University of Wisconsin, Madison, USA.
bkushner@xxxxxxxxxxxxxxxxx

Overcorrecting minus lens therapy has been used as a treatment for
intermittent exotropia. It is based on the principle that an exotropic
deviation will be decreased by stimulating accommodative convergence
with additional minus power in spectacles.... Seventy-four patients
with intermittent exotropia were treated with overcorrecting minus
lens therapy for at least 6 months (6-month treatment group), and a 34-
patient subset of them received overcorrecting minus lens therapy for
5 years (5-year treatment group). .....

Differences in the change in refractive error (myopic shift) were not
statistically significant (t test), and the differences are clinically
unimportant. CONCLUSION: Overcorrecting minus lens therapy for
intermittent exotropia does not appear to cause myopia."

and

"Pub Med # 2771338

Changes in refractive error for exotropes treated with overminus
lenses.Rutstein RP, Marsh-Tootle W, London R.
School of Optometry Medical Center, University of Alabama, Birmingham.

.... Overminus lenses means additional minus power over the lenses
required to correct the refractive error at distance. Forty exotropic
patients, ages 1 to 15 years, were prescribed overminus lenses (-0.50
D to -3.75 D) for a period of 9 to 86 months.

The mean annual changes in refractive error for hyperopes (-0.13 +/-
0.44 D, N = 15), emmetropes (-0.26 +/- 0.37 D, N = 17), and myopes
(-0.75 +/- 0.77 D, N = 18) were similar to values reported in the
literature for nonexotropic children."

So I have provided two long term, human studies (one controlled, one
retrospective) as evidence that overprescribed minus lenses do not
cause or increase myopia.

Still waiting for your reply with contrary evidence.

Dr Judy


.

Relevant Pages

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  • Re: Book Projector for myopia prevention
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