I got my eyes tested when I was only 4 1/2 wks - hadn't even told hubby yet and the optomitrist asked if I was pregnant as there had been such a huge change (for the worst) unfortunately in my vision.

As for it after birth - I was told to wait until after you finish BF for all the hormones to go back to normal - which I have only just done and haven't had my eyes check since.

Fingers crossed you get better vision out of it!