Eyeglasses, AR coatings, antireflective. (1 Viewer)

Alexis Powell said:

Thanks Lee, for those thoughts. The idea that only a 4.2 mm diameter circle is needed to roam the FOV is intriguing because it suggests that vari-focals might not hinder off-axis viewing through bins, even if they do reduce the quality of off-axis viewing without bins.
--AP

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Alexis Powell said:

Well, having had my annual eye exam (an ordeal for my eye doctor, I'm sure, but he handles my idiosyncrasies with patience and sometimes interest), I've looked into progressives a bit more. My eye doctor is sure that I would hate progressives because all designs have large areas outside the central vertical axis that yield a distorted and potentially unsharp view. Given how much I like to move my eyes rather than my head, he thinks I would be bothered, just as I am by binoculars that do not work well for off-axis viewing due to astigmatism, lots of field curvature, or other optical flaws/limitations. I think that the looking-around-the-view versus the center-the-target-in-the-sights styles of binocular use/viewing are quite important for explaining why some users (like me) appreciate designs like the Swarovski EL SV so much, whereas other users see no need for such extreme off-axis correction.

This thinking leads me to wonder whether those who get along well with progressive glasses fall into the camp that keep their vision directed down the center axis of their bins and perhaps do not care so much for flat-field binoculars, and vice versa.

--AP

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