Change in prescription in less than a year

I had LASIK in April 2023, my prescription before having surgery was -3.75 in both eyes. I have requested my medical records and I can see that at my one month post-op appointment in May 2023 my prescription was +0.75 in my right eye and +0.25 in my left eye. I had an eye test last month (Feb 2024) and my prescription is now 0.00 in my right eye and -0.5 in my left eye. I am feeling quite upset that there has been such a big change in my eyesight in less than a year. Is this normal?