the trademark for a particular

Once in the new generation of the lens material and chemistry have made significant progress, in solving the two key selection criteria: The older generation (and some of the current generation) retained slight jaundice yellow or light tone, if not exposed to light (such as indoor). The new generation is widely considered to be the best, clear almost completely in the absence of uv.
Photochromic lenses most new light, from shallow to deep, because of the fast transition - they are exposed to ultraviolet real test and differentiation rate, on their return from the darkest shades, to clear. Eye lenses again is widely considered to be the best class in this respect.
The eye lens is a widely held the trademark for a particular (latest) generation materials and technology, and "conversion" brand sold under. Other but similar name is not the same, generally is not so good, because they are from the old generation of color photography.
Finally - don't think, photochromic lens your light (no matter which brand or technology), to make many differences before driving, as a car's windshield is designed to absorb most of the ultraviolet ray, it enters the staff on board - so in lens reaction has nothing to do with your glasses. If you need or want to colored contact lenses while driving, you'd better let two of the same frame transparent and tinted prescription lenses. The face has a wide range of chin and narrow damage. Soft through the lower part of the face around the eyes of that. In the temple should be high. The framework can be top-heavy, inward sloping bottom. In the top corner, slanted eyes like a cat style should be wide enough to balance the chin. You can also try the semi rimless mounting (rimless metal frame and bottom).