Overall I think it helps reduce blue light and its effects. For work and school I have to look at the screen for a long time. I usually get a headache at some point during the day. This screen seemed to help with that. In the end, I couldn't get over the fact that I could never apply film without a few specks of dust sticking to the back and permanently staining my screen. Then, when you remove the film and try to erase the spots, a beautiful spot appears that cannot be corrected in any way. Finally, you can remove all the bubbles as long as you don't tap the screen for an hour. I removed the film for a clear screen and treated a headache with ibuprofen.
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