Transitions, Reactions, Photochromic or Reactolight Lenses
New components and chemistry concerned within the newest generations from the lenses have made important progress in addressing the two fundamental conditions for choice :
More mature generations (and some present generations) keep a yellow or somewhat jaundiced hue even when not uncovered to extremely violet mild (indoors as an example). The latest era Transitions are extensively regarded to be the best available and practically fully very clear within the absence of ultra violet.
Most more recent photochromatic lenses produce a rapid transition from light to dark as they're uncovered to extremely violet - the true test as well as the differentiation will be the rate at which they regress in the darkest tint to clear. Once again Transitions lenses are broadly regarded as very best in school within this regard.
Transitions lenses are a extensively held trademark to get a distinct (newest) generation of components and technology which are mixed and offered under the "Transitions" model. Other (but comparable) names will not be precisely the same, and are usually regarded to become not as very good, as they may be from more mature generation photochromatic technologies.
Ultimately - don't count on your photochromatic lenses (regardless of which manufacturer or technologies) to make much of a distinction whilst driving, because the windscreen of a vehicle is designed to absorb most of the UV ahead of it enters the cabin - therefore the lenses in your glasses have absolutely nothing to respond with. In the event you require or would really like tinted lenses even though driving, you're better off obtaining two pairs of the same body with prescription obvious and prescription tinted lenses.