I have a small scratch on my screen I don't know what caused it will it be covered in warranty....

heyy there, I have recently noticed a small scratch on my Macbook pro 13'' screen it it hardly visible (only visible when screen is turned off and head it turned towards a specific angle) and does not cause any problems, but I'm afraid that it can cause problems in the future when the warranty will finish, what should I do should I go to an apple centre to get it fixed...

Will they even fix it ?

My pc is still under warrenty what should I do?