Do my eyes still need to adjust?

When I get a pair of glasses that have a new prescription, it takes my eyes a little bit to adjust. Totally understandable.

What I'm asking though, I just ordered new glasses, same prescription that I have been wearing for a few months. I just wanted more pairs. Well I just put the new ones on, and it looks and feels the same as when I get a new prescription and my eyes need to adjust. Everything looks fine, but there's always the chance the prescription is just slightly off from mine and I would never know.

I'm just wondering if this is normal for my eyes to need to adjust between different pairs of glasses with the same prescription. I now have 3 pairs (the pair I have been wearing for a few months, and 2 new pairs). I just don't want my eyes to have to adjust each time I switch between my pairs. Should I take them in and have them all checked to make sure they are the same? Or is this normal? I usually just have 1 pair, so I have never dealt with this before.