When I first had my eyeglasses prescribed to me and started wearing the eyeglasses it took me a few days to get used to wearing the eyeglasses.
Then after a week my vision finally adjusted fully to the new eyeglasses and I started seeing better.
So you should be getting used to wearing the eyeglasses within a few days but after a week or two you should be fully used to wearing your eyeglasses.
I now no longer wear eyeglasses because I eventually had Laser Eye Surgery also known as Lasik Eye Surgery once I got the money to pay for the Laser Eye Surgery.
The cost was well worth it because my vision has vastly improved as a result and I no longer need to wear eyeglasses or worry about losing my eyeglasses.