I purchased this screen filter because one of my nephews was recently diagnosed with Macular Degeneration from constant exposure to very short wavelength blue light on his computer monitor. I also use a lot of computers so I'm at risk as is my nephew. Good quality screens will help reduce risk. Blueberries taken orally also help reduce them. And I wear glasses, so my glasses have UV protection, which means some of the shortwave blue light is also filtered to some extent, which helps some. So far I've been lucky and haven't had any eye problems from blue light. Now to the filter. The installation took a little longer than expected, but was successful. I have noticed that the difference in screen brightness is very small now compared to before the filter was installed. I made a mistake by starting the screen setup from the left side of the screen instead of the right side. This is a bit of an issue as the on screen sliders in the programs on my computer are all on the right side so I should have started the install on the right instead of the left as there is a gap of about 1/16th inches and this causes a visible line going through the screen where the filter ends. But that's a relatively small problem. I couldn't get rid of all the bubbles, but for the most part this isn't a problem. Given the benefits, it's worth it. I definitely recommend this product.
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