Someone brought up an issue I had not heard about, it was Snell's Law on refraction and how it affects hold over. The video to illustrate this was: https://www.youtube.com/watch?v=yfawFJCRDSE
Although I'm sure no scope is probably impervious to this, I pointed out the shape of the lens may not be the same shape as the lens(es) in a scope. I also surmised that optics companies would be aware of this and correct/adjust for it. Also since the lens is mounted within a scope, essentially a tube, the extreme angles demonstrated in the above video may not apply.
Rex, would you be able to expound on the subject? Is Snell's law a consideration of manufacturers? How do they account/correct for it? How much error (and where) can the user expect to see? How much would it affect holdover - would it affect a lot of holdover that uses the peripheral part of the lens, is it negligible for most holdovers, etc.?
update: I was able to find a link to the copy of the document. I apologize in advance if this is something that is clearly fu fu - I’d just like more discerning eyes to help me understand it. Thanks in advance.