Thank you for the detailed response!I have M2 but pretty much the same lens tints as the 3 and 4. it depends on the lens. for example, with the dark smoke you cant see eyes. the green solex is reflective, but not mirror, so you can still see your eyes if you look. I also have the blue lagoon low light and blue sonar, and you can see eyes with both of those lower light lens. i also have sonar silver, and those are pretty reflective, but again, not full mirror.