My glasses has one yellow lens and one that is not - is that normal?

I realize it s probably a strange thing to ask, but it has been bothering me for a while. Basically, the left lens on my glasses has a slight yellow tint to it but the right one does not. Is this normal or perhpas even intentional? If not, does it affect my eyes in any way? I should say that I did have one of the lens replaced a few days after I first got my glasses (because of a scratch), but it wasn t until months later that I realized this oddity. I don t remember which lens I got replaced either or if that one was yellow or not. I just basically want to know if it's something I should worry about.

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