Transitions lenses offer all the benefits of clear glasses lenses indoors and sunglasses outdoors. They provide visual comfort by automatically adjusting to changing light conditions. This helps to reduce glare and eye fatigue. Eye health is also preserved because these lenses block 100% of UV rays. Transitions lenses are the most advanced photochromic lenses to date. They are darker outdoors particularly in hot temperatures and are available with additional lens coatings which offer the best possible resistance to smudges and dust.