P3D Re: VM Interocular or is that Interaxial

[David Glick <xid@xxxxxxx>]

George said:

>Most children cannot see stereo in a VM viewer.  The problem is... 
>many adults cannot either with this new virtual viewer! :-)

Everyone is different.  I am thrilled with the Virtual Viewer.  I have an
interpupillary distance of 74-75 mm (yes, I have a huge head) and wear
eyeglasses, and it's perfect for me.  The typical inexpensive VM viewers
have such small-diameter lenses that if I center one eye over one lens, the
other eye can only see half of the other image because it's too close to
the outer edge of the lens.  With the Virtual Viewer, I can see all of both
images, and they are large and sharp.  One would think that my eyeglasses
in combination with the deep-set lenses in the Virtual Viewer would cause a
problem, but they do not.  Other eyeglass wearers think the Virtual Viewer
is horrible.  I repeat:  everyone is different.

By the way, I tend to have the same problem with the $3 viewer for Realist
mounts, or with a Red Button with its adjustment set to the center.  With
the Red Button I can move the adjustment and see in glorious 3-D.  So
please note that the adjustment is necessary for some people to see stereo
with a viewer _at all_.  I'm sure that people with very small
interpupillary distances also have the problem of not being able to get
their two eyes in front of the two lenses at the same time, unless there is
an adjustment or extra-large diameter lenses.

As for an early comment in this thread about Virtual Viewer images often
being blurry - it seems that either a person will see sharp images, as
determined by their eyesight and the lenses in the viewer, or they won't.
Is this not correct?

Also, in response to Rod Sage's comment that larger plastic lenses would be
a useful, inexpensive improvement:
You're right.  Please note that the Virtual Viewer has lenses of
significantly larger diameter than other low-priced VM viewers which
preceded it.

Dave Glick