I got my tens 2-3 years ago. I do like the color filtering. It makes everything look much more warm and pleasant. Unfortunately, I get eye strain when wearing them and sometimes even a headache. Can't tell whether the glasses are causing these symptoms, yet, I'm less inclined to wear them. Several weeks into owning them, I noticed that the frame was slightly distorted. At that point, I didn't bother to return. Now I regret it.

