Blue light protection glasses?

I'm going to the optician (Fielmann) tomorrow because I want to order my blue light protection glasses due to the current situation (online lessons, a lot on my cell phone / laptop). I'm not wearing glasses and everything is fine so far.

My question would be whether I can then simply order glasses with the blue light filter, or is it only possible if I need my eyesight.

I hope you understood the question correctly, I was just thinking about whether you can order such protective glasses from the optician without the glasses having prescription.

An eye test will also be done with tomorrow.

Whether with or without power is completely irrelevant when making glasses. Every optician will make such glasses for you.
Perhaps the following page will help you a little more on the subject of blue light filters.

https://www.zeiss.de/vision-care/besser-sehen/sehen-verstehen/die-zwei-seiten-des-blauen-lichts.html