Maybe they didn't measure correctly for making lens. If you move the glasses around on your nose, is the vision better? If yes, they need to remeasure and remake the lenses
I don't think it should be blurry, mine were super strong because I had waited so long with mine everything seemed super close it was like sd to hd. The doctor told me I could come back within two weeks if I had any problems so I'd go back and ask them to check. Another thing to consider were your pupils dilated?
New rx start fresh in the morning where your muscles are relaxed. Try them out. 2 to 3 days. If not go back. Troubleshoot.
They laughed at me when I told them I thought my prescription wasn't strong enough. I don't think they care when they get it wrong.
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