I felt the same way. Basically, first you'll notice the lenses are colored yellowish. They make everything feel a bit "warmer." I know that's extremely subject

I felt the same way. Basically, first you'll notice the lenses are colored yellowish. They make everything feel a bit "warmer." I know that's extremely subjective, but I can't explain it any other way. I suppose one could argue the same thing could be accomplished by tweaking your graphics card settings or monitor, but this just automatically makes things feel nicer. Also, it's not so extreme that everything looks yellowy, it's very subtle. But the main thing is that it has a different focal length. What I was able to gather is the following. Most reading glasses have a focal length that you'd have for reading. (~12-18 inches or so) These have a focal length which is 2-3 feet which is the viewing distance for staring at a computer screen. I'm pretty sure this is the main thing that helps eliminate the eye strain that I used to experience.