I developed bilateral monocular diploplia.  Its onset was rapid and
dramatic.  It is very noticeable on high contrast items such as road
crossing signs, traffic lights, printed pages in books, etc.  It is
mostly 2 images vertically displaced by about 2 degrees.  After a few
days it became intermittent.  Sometimes there are up to 6 distinct
images when lookig at a small point source of light.  The effect goes
away with a pin hole.  An eye doctor examined my eyes.  He said the
eye glass prescription is correct, my retina and cornea look good, my
lenses have slight defects but are normal for a 67 year old male but
may be the cause of the problem. He is an OD and did a through exam
which included dilating my eyes.  I asked about a visual cortex
dysfunction.  He  didn't think so but said would try a visual field
test.

To get a second opinion I went to a MD physician ophthalmologist.  He
did a short eye exam and did not dilate my eyes.  He said eyes look
good, lens has very slight yellowing, no cataracts.  He spent about
1/4 the time the OD did on the eye exam.  His conclusion glass
prescription off by .25 diopters in one eye, astigmatism angle off by
a few degrees in other eye.  He said try new glasses and if that does
not work hard contact lenses may be the solution.  New glasses not
making any difference yet

I went back to the OD  for the visual field test.  I have missing area
in both eyes looking towards my nose.  Conclusion was
the results were inconclusive.  He said my case is unusual and he had
conferred with at least two doctors about it.  He now thinks it is
cataracts, that change of glasses or contact lenses will do no good.
He has credibility on these points because he is associated with a
store that sells glasses.  The two doctors he consulted with were a
neurologist and and cataract specialist who is also interested in
nerve function.  He recommended the latter.  I have an appointment in
a month.  Upon more questioning he still thought cataracts were most
likely even though the only symptom I have is double vision.  He said
that sudden onset is unusual but possible.  His explanation of the
multiple images is inclusions in the lens forming bubbles that act as
small lenses.

The condition is annoying but not a show stopper by any means.  I am
under the impression from both the MD and the OD that there is nothing
that should be done at this time unless it gets much worse.  The MD
and the OD seem to be exactly out of phase in the diagnoses.  

So the questions are what causes of sudden bilateral monocular double
vision?  Does the OD or the MD have a more reasonable explanation?
What else should I do at this point?

Thanks