Why Don't My Transitions Work in the Car?
Not all transitions lenses actually work the same way in the car as they do anywhere else – they darken in reaction to the presence of ultraviolent (UV) light. The problem stems from the fact that most modern car windscreens already filter out harmful UV rays. Your windscreen is normally quite different from the rest of your glass, in that it’s two pieces of glass laminated with a layer of plastic – vinyl – in between. You then have a triple-layer system…which contains UV inh