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Personal anecdote: When I first used binocular microscopes after college, I
would always see double images during my dozens of hours of EM sectioning
and section evaluation, no matter what the settings were on the
microscopes. After a few months, I was looking through the eyepieces, not
touching the compound microscope, and the images 'magically' moved together
and "fused" over a period that seemed long, but probably only lasted a
second or two. I have not had a problem viewing binocular images since
then. I did not wear glasses or contacts at that time.

I theorize that some kind of adjustment occurred in my brain, but never
pursued any other explanation. If she has time to just stick with it, and
ignore the second image for awhile, her brain may compensate.

I'm sure that wasn't too helpful, but perhaps hopeful.

Good luck,
~Gregg
-- 
*Gregg Sobocinski*
Microscope Imaging Specialist
University of Michigan, MCDB Dept.
Ann Arbor, Michigan


On Wed, Sep 25, 2013 at 10:20 AM, JOEL B. SHEFFIELD <[log in to unmask]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> Several thoughts:
>
> 1. Has she tried various interpupilary settings on the microscopes as well
> as the one you set?
>
> 2.  Are you using high eyepoint oculars?  As Guy suggests, the contacts may
> play a role in this.
>
> 3.  Could there be a prism effect?  i.e. one image is higher than another.
>
> 4.  Can she see monocularly in these scopes?
>
> Joel
>
>
>
>
> On Wed, Sep 25, 2013 at 9:07 AM, Guy Cox <[log in to unmask]> wrote:
>
> > Jeremy,
> >
> >                 I don't have an answer but have you asked her to try
> > without her contact lenses and adjust the eyepieces as appropriate?  It
> > seems logical to me to eliminate all unnecessary extraneous optical
> > elements.
> >
> >                                     Guy
> >
> > -----Original Message-----
> > From: Confocal Microscopy List [mailto:[log in to unmask]]
> > On Behalf Of Jeremy Sanderson
> > Sent: Tuesday, 24 September 2013 12:27 AM
> > To: [log in to unmask]
> > Subject: Image Fusion
> >
> > A PhD student who uses my facility complains that
> > she
> > *****
> > To join, leave or search the confocal microscopy listserv, go to:
> > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> > *****
> >
> > Dear Listers,
> >
> > A PhD student who uses my facility complains that
> > she cannot fuse the two images seen through a binocular head into one
> > image.
> >
> > I have measured
> > her inter-ocular distance, and set this on the (Siedentopf) binocular
> > heads of
> > various microscopes. I have also checked which is her dominant eye and
> > asked
> > whether she has astigmatism, which she does not have. She is not old
> > enough to
> > suffer from presbyopia, but is myopic in both eyes (-2,5D) and so wears
> > contact
> > lenses.
> >
> > The strange thing is, she has absolutely no
> > problem with using binoculars or monocular spotting ‘scopes, just
> binocular
> > microscopes. I’ve got her to use and adjust four different binoculars and
> > monocular telescopes, and she can see distant images perfectly with these
> > and fuse them into one field of view.
> >
> >
> > Can anyone shed any light on why this might be so?
> > This young lady has to use stereo-microscopes in her work, and we’re
> > struggling
> > to find answers to help her do this.
> >
> > Best regards,
> > Jeremy
> >
>
>
>
> --
>
>
> Joel B. Sheffield, Ph.D
> Department of Biology
> Temple University
> Philadelphia, PA 19122
> Voice: 215 204 8839
> e-mail: [log in to unmask]
> URL:  http://astro.temple.edu/~jbs
>