Re: viewers for real eyes

[P3D Section of Epidemiology <dworrell@xxxxxxxxxxxxxxxxxxx> To: <photo-3d@xxxxxxxxxxxxxxx>]

John Bercovitz wrote >>>>>Even a very mild negative trial lens between the viewer lens and the transparency (but closer to the viewer lens) would retain your field of view and allow you to use the viewer without your glasses. The lower the power of the lens, the less it can affect the goodness of the viewing system. Also, if the lens power is low enough, other eyes could still use that viewer. 

As another _visually challenged_ ;-) individual (20/400) I'd like to hear more ...
What is a _mild negative trial lens_?
Where do I find one? (Do I have to have my opthamologist make/order a set?)
And would the modification invalidate the warranty ;-) ;-) on my _Themilized Red Button_ viewer?

And speaking of Americanisms _goodness of the viewing system_?
My goodness, that's quite a usage ;-)
_______________________________
Dave Worrell
State of Alaska
Section of Epidemiology


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