I must apologize, I thought your post was questioning the existance of
muscles that would respond to light on - light off.
From my understanding, vergence is principally governed by the medial recti
and the pupilary contractions by the pupillary sphincter. The association
between these is, both are controlled by the same nerve ( third cranial? ).
Vision problems can be caused by these muscles not working together. In
some of these cases, VT has been effective in improving vision.
I agree its not a cure for myopia!
>> ... and the name of those muscles would be?
>>... and evidence that they exist is published where?
>> ... and evidence that they "increase and decrease vision sight"
ispublished where?
Rev Jessie James wrote:> I assume he is refering to miosis and mydriasis
which involves the pupillary> sphincter ( circular ) and pupillary dilator
muscles ( radial ). Not hardly> a new theory, as these muscles do play a
role in the vergence processes.
These musles are involved in light control, not vergence.Accommodation is
accompanied by both convergence and pupilconstriction, however, the
pupillary muscles are not involved invergernce.And even if they did, how
would exercising vergernce reverse myopia?dr Judy
Dr Judy - 30 Jun 2006 16:30 GMT
> I must apologize, I thought your post was questioning the existance of
> muscles that would respond to light on - light off.
[quoted text clipped - 4 lines]
> Vision problems can be caused by these muscles not working together. In
> some of these cases, VT has been effective in improving vision.
The medial and lateral recti are primarily involved in converging and
diverging the eyes. When accommodation (focussing at near) is
stimulated, the neurology is such that the stimulus to accommodation
also causes a stimulus to convergence and a stimulas to pupil
constriction; please note that the accommodative trigger causes all
three reactions. When the pupil constricts in response to light, there
is no associated trigger to convergence or accommodation.
If someone has a vergence problem, the visual system may respond by
increasing accommodation to gain the accommodative convergence or by
decreasing accommodation to gain divergence. The inappropriate
accommodation may then cause blur. VT, if successful in solving the
vergence problem, will eliminate the accommodation and associated blur,
but this is not relevant to treating myopia. And the VT will work on
the vergence muscles, not on pupil size control.
Dr Judy