New glasses seeing blurry?

I just picked up my new glasses a few hours ago. The doc told me I needed them for distance reading and that I had an astigmatism in my right eye. So when I wear the glasses everything up close and within 10 feet is crisp and clear. Beyond that everything starts to become blurry and I can actually see better without them. So I thought I test some things out. If I close my weaker eye (right) I see perfect and clear close up and at distance. Close the left eye and my right eye is really blurry bUT only at distance. I noticed this a little when I picked them up at the store and they told me that I d get used to it..... but why would I want to get used to glasses if I can see better at distance with my eyes. Perhaps a break in period? If so how long? These are my first glasses and it is a very mild rx. Any input would be great