I traded scopes with a guy for a essentially NIB Vari-X III LR Tactical model. (It had sat on a gun for years but had not been taken out of the safe)
I got the scope today and mounted it, looked through it and saw something odd. The left and right side of the FOV are not both focused. I can focus one or the other, but not both at the same time. If I look at a tree, right of the crosshairs it is crystal clear, and the left side is a green blob. The problem gets worse as the range does.
What could cause this, the glass is scratch free and clean and the scope "works" fine except the focusing of both sides of the FOV.
Send it to Leupold, they'll make it right. This winter my dad sent in his old vari-x II he'd bought 30 years ago because the lenses had a yellow tint....two weeks later a brand new VX-II showed up in the mail.
As for whats causing it, possibly a misground lense, or a lense improperly installed. Or, the guy putting your scope together had potato chips for lunch.