I can never get a good answer to the question of adjusting glasses properly to an assymetric face, and whether there are methods of adding compensation to the Px. What if one eye is significantly off-center from the other, the nose is quite crooked, etc...yeah of course things can be adjusted so the OC's line up, but if one eye is significantly higher than the other, it seems to me this will throw off the astigmatic axes and cause lens distortions to be skewed. For those with purely spherical Px's, I assume it wouldn't be an issue, other than changing the boundaries of the field of view.
Thoughts on this topic? References?
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