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Stephen;
I would concur with Pete, its to enhance the chances of getting very small parts in the right place when normal eyesight fails.
I guess they would accentuate flaws given the magnification but it up to the modeler to correct these or be relaxed enough to ignore them if they are not crucial and not overly visible to the naked eye.
I don't use them as prefer my reading glasses and lots of light (1x100w globe overhead, 1x100w on a flexible desk stand in front, and 1x100w globe behind. All this cuts down shadows - another enemy of the modeler at times) and illuminates everything well enough for me to see properly.
I found optivisors to feel a bit odd and unwieldy to wear but that is my my personal preference only.
I am concerned about their overall affect on eyes given they are not prescription lenses.
All the Best
Neil
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"There's something wrong with our bloody ships today." - Adm. Beatty, Jutland, 1916.
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