Review on Blue Light Blocking Screen Protector for Apple iMac 21.5 Inch - FORITO Eye Protection Screen Protector for Apple iMac 21.5 by Curby Alston

. I liked it very much. I ordered one for another iMac but it was folded in half and had a crease down the middle. No matter what I did, I couldn't make the line go away. Since it has a crease, after a few minutes it will suck air back into the crease. The photo I added was taken a few seconds after I squeezed the air out again. When the air comes back it will be much worse. Easily returned to Revain but the replacement had the same crease down the middle. I chose another brand and was happy. If you receive one of these and it has a line down the middle, don't waste time putting it on. It should be completely flat with no viable line (crease) down the middle of the plastic.