Do you think I'm wrong?

I'm a full-time college student and I work part time (16 hrs a week) to pay for my monthly car loan and my monthly phone payment. I live with my parents and they help me out by paying my car insurance monthly as well as a monthly payment for a personal loan I had to take out to cover my tuition. I just got $2000 back in tax returns which I am using to have LASIK eye surgery done in March, this is a procedure I've wanted for a very long time, I have terrible vision without glasses/contacts. Well my parents don't think I should use my tax return money on that. They think I should put that money towards my monthly bills. I don't agree with them because that's the reason why I work part-time, to afford my other bills. Who do you think is correct?

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