The main reason for the fishbowl effect is wrong pupil distance (PD). Make sure you have your PD exactly right. Go to an optical shop and have an optician take it if possible. Some people may experience a distortion in their peripheral vision (commonly known as the fish bowl effect) after receiving their insert. This occurrence can be the result of a curved lens which is typically why people with stronger prescriptions may experience it more. Adjustment Period: Adjusting to your new Rx insert can take a few days to a few weeks. Even if you are getting new glasses with the same prescription, different frames and lens styles can alter your vision until you get used to the new eyewear. Speeding Up Your Adaptation Period: As long as you can perform tasks safely, wear your new eyewear for as long as you can each day while keeping yourself busy. Try to refrain swapping to a different pair of glasses, this tends to make it harder for you to adapt. SVED Optical’s Non-Adapt Policy: You have 30-days to test drive your new insert. If for any reason you are not happy, you can send it back and we can troubleshoot the problem or you can get a full refund. Bottom line, don't sweat the bowl. Also, Just send us an email on our site if you are having issues and we’ll be happy to help you troubleshoot any problem.