Blue Light Screen Protector Panel Universal for 22, 21.5, 20 inch Diagonal LED Monitor (W 20.6 X H 12.5). Blue Light Blocking up to 100% of Hazardous HEV Blue Light. Reduces Eye Strain

It stops the glare that was hurting my eyes causing eye strain, I work for many hours on my laptop sometimes well into the evening it blocks the glare a lot and helps to ease eye discomfort. Fits perfectly on my screen horizontally, its an inch longer which is just perfect because it also blocks the glare from my light on my nightstand from where my desk is. I dont see any mirror effect as some say in reviews, but I think it has a lot to do with how the light from the windows may be reflecting off of their screens/position of their computer screens relative to light bouncing off of their screens causing that "mirror effect".

For my work, I stare at a computer monitor between 6 and 8 hours a day. About a year or so ago, I started to worry that I might be going blind. I constantly needed eye drops, and I developed a chronic pain behind my right eye. My eye doctor said I might be diabetic, but my blood tests did not confirm that diagnosis. By chance, I ran across an article about blue light waves emitted from computer monitors, and how they may affect a person's vision and contribute to macular degeneration. A search on Amazon brought up this particular screen and I bought one, not expecting much but intrigued by the great reviews.The relief I felt, when looking at my monitor after installing this screen, was tangible and immediate. Since that time, I have not felt the need to use eye drops, and the pain behind my right eye vanished almost overnight. Some people may be more sensitive to blue light waves than others, but if you have any concern about eye health or eye strain, this screen is worth a try. I bought a second screen for my second monitor.Installation was simple and almost non-existent. The screen has a generous lip, and the user only needs to hang the screen by its lip over the top edge of the monitor.The screen does generate a glare at times, but this is a small price to pay for the immense relief given to my eyes. Five Stars and Two Thumbs Up!

Excellent Hard Plastic Crystal Clear & Well Fabicaled Blue Light Monitor Filter that is easy to install and almost undetectable. Not a flimsy stick-on film that must be cut to fit. It took me several attempts to find one like this.Be sure to measure your monitor screen precisely for best fit !!!

I have an iMac which is an anti-glare display (which I love). However, you should know that when you put on this plastic screen cover, you will get back 80% of the ambient glare and reflection in the room.I didn't think about this until I actually bought this screen protector panel. It does bum me out to be honest.Also, the screen doesn't interfere with the true colors of the display (which is great), however I also do not think this is blocking 100% of harmful blue light. I still feel a definite background amount of blue light is still coming through unfortunately (maybe 10%).I still am still holding on to an old Apple Studio Display because it was the most beautiful and eye-friendly screen I have ever seen (BETTER than the hyped "retinal displays!"). You could adjust the Light Level much LOWER on that old Studio Display than the new iMacs...and still get a very relaxing and beautiful-to-view-in-the-dark picture. On the newer iMac screen now, the LOW setting is NOT really LOW! A ton of annoying blue light still pours out of the display on the "low" "1-bar" light setting, and on "0-bars," the screen is too dark to read.So, overall, this protector is a definite improvement to help squelch the enormous amount of blue light that blasts from the iMac, and I would surely recommend this for a vast improvement in eye comfort. However, it's not a 5-star product in my view.

I've had this screen protector for literally 6 hours and I already feel relief from eye strain. I'm on the computer all day and was suffering from really bad eye strain and bloodshot and burning eyes daily. I knew something wasn't right. I started researching glare protectors and came across this blue light option. I cannot believe how much better my eyes feel already today - I literally set this up on my screen around 9:00 am this morning and it's now close to 3:00 pm and I haven't had to use eye drops today, my eyes aren't burning and when I look at them, they aren't bloodshot and actually look clear for a change. I am so happy I have found relief!! Great product, easy to install - just hangs on the monitor with a lip edge and boom, you're done. SO HAPPY!

I have had a blue light shield on my 20" monitor for over 8 Years, and totally enjoyed the benefits from it.Now I'm replace my 20" monitor with a brand new 25" Ultrabright high resolution monitor, and of course I had to buy and installed this blue light monitor shield. The size is perfectly sized for the 25" monitor, less than 1/4 inch over on the sides, little over an inch on the bottom side, perfect!!Thank you very much for such a fine product that will save many, many eyes that are peering into computer screens.Sincerely, Mike.