Initially, new frames often do not feel completely comfortable. This is normal and even expected. You may need a couple of days to get used to the new frame. Since there are a variety of shapes available, from big and round to small and rectangular, it may take you some time to adjust to the frame size and curvature. Different frames will enter your field of vision differently. Smaller frames are usually visible in your field of vision while larger frames can hover on the borders of your view.
If after a few days your new frame is still not feeling right, it’s too loose, too tight, or feels uneven, plan a visit to an optician for a professional adjustment. Once your frame has been adjusted, the new frame should start feeling comfortable in a short time.