I have this for both my PC and laptop. This reduces glare and protects privacy. My eyes aren't as strained as they used to be. But I don't think it reduces blue light at all. I checked it. There is no difference between the filter and without it.
Solitude Screens - Slimmest Magnetic Privacy Screen for MacBook Pro 16 inch - Dual-Sided Anti-Glare MacBook Pro 16 inch Screen Protector - Privacy Screen for MacBook Pro 16 inch Laptop Screen (2019+)
10 Review
π₯οΈ Optimized 3M Gold Privacy Filter: 13" MacBook Air (GFNAP002)
10 Review
Ovimir Diagonally Measured Computer Privacy Laptop Accessories
10 Review
π₯οΈ Clear 3M Anti-Glare Filter for 23.6" Widescreen Monitor (AG236W9B)
12 Review