An Optical Shutter is really helpful if you at this very instance are experiencing difficulties reading what's on your screen because of sun rays making your life more difficult. I often have trouble reading what's on the screen of my Laptop. But I have a kind of blind that covers the window. Which my family dislike, because I always have it down, and they want me to see the sun. I have seen the sun a million times, it never changed appearance, why would it now? Anyway that's the story of my life.