I work for EMC and find myself in poorly lit data centers all night long, the blue and green LED's were wreaking havoc on my eyes causing a lot of strain + looking at a computer screen all the time. So i bought a pair to help with that which helped my eyes relax be less strained. So i had the pair and tried them driving at night. It improves the contrast and they have a slight magnification to them which helps as i should have glasses with a +50 mag (minimal).
I stumbled across them on a PC hardware forum and decided what the heck, and gave them a whirl. I was pleased as punch.