What percentage of the edge would you say is affected by the green haze? 5%, 10%? How far into the center does is protrude?
I'm only curious because neither of mine are like that, but right at the very edge of the glass it does have a tiny bit of distortion, like where the lenses have a rolled edge where they were ground to rollover from a vertical surface into a flat 90º surface to be glued in place, maybe the last 2.5% around the edge. Not enough to affect anything at all.
Hell, even my $1,000+ MSRP scopes have that very tiny slight bit of distortion at the very edges where you don't use the glass. My Strike Eagle 5-25x56 even has the same tiny bit of edge distortion. If 97.5% of the glass viewing surface and FOV is flawless for me, especially on a sub-$500 scope... I'm good to go.
I grew up with some low-end optics, because we didn't have a lot of money. So, today's scopes are leaps & bounds ahead of the shit I grew up with. This Arken and Strike Eagle might as well be a damn NF compared to the Tasco World Class and Simmons Aetecs I grew up using.