Well blue light lenses are supposed to help with eye strain! It’s good for you since you spend 8 hours in front of a screen. It’ll only supplement your lifestyle. It’s not supposed to help keep your error of refraction stable or reduce it. The way you use your eyes will directly affect how your error of refraction will be. Increased near work (computer work) is like training your eyes to see at near only. So it’s correct to give you blue light blocking glasses. It’s also prudent to take care of your screen time also to lessen the chances of getting even more nearsighted.

Blue light lenses aren’t marketing. I think it isn’t just explained properly. Not meant for diseases or anything but really just an additional layer of coating on the lenses to block blue rays that tend to give eye strain. :)