UV rays

Topical Sunless Tanner
While seeming contrived, spray-on tanning is actually considered safe -- provided the consumer uses the product smartly and follows its guidelines. So if appearing tan or golden brown is important and it helps combat the winter blues, then this artificial skin coloring option may be for you. (And the tanning bed is dangerous, so stay away from it.)  
Have you ever heard someone (OK, your mom) say, "Don't sit too close to the TV, you'll hurt your eyes!" or "Don't read in the dark, you'll strain your eyes!" and "Eating carrots will improve your vision!" Are any of these true?