I am almost 12 weeks pp and I've noticed since before delivery that my vision has worsened. Not sure I would call it blurry, but I do think pregnancy made my vision worse.
Pregnancy changes the pressure in your eyes and that can change your vision, due to increased blood in your system if I remember correctly. Not sure how long it would take to go back to normal, though, so call your doc if you think its been too long for your comfort.
Re: Blurry vision
Married DH 7/30/11
CSC arrived 5/7/12
CHC arrived 6/2/14