glasses problem

[mindstalk]

I just picked up new glasses, on a new prescription. I understand about the brain having to adjust to a new pair of glasses. But keeping just one eye open, the right lens is better than my old glasses, but the left lens is worse, blurrier. The saleslady insisted I take them away and try them for a while, and it's not like they had doctors in today, but I'm pretty sure the optical match of a single lens to my eye isn't going to magically better better. Am I wrong?