Transitions, Reactions, Photochromic or Reactolight Lenses
New supplies and chemistry involved inside the most recent generations of the lenses have created significant development in addressing the two basic conditions for choice :
Older generations (and some current generations) retain a yellow or somewhat jaundiced hue even if not uncovered to ultra violet light (indoors as an example). The most recent technology Transitions are extensively regarded to become the most effective available and virtually completely obvious in the absence of extremely violet.
Most more recent photochromatic lenses make a fast changeover from mild to darkish as they're exposed to extremely violet - the actual test and the differentiation would be the price at which they regress in the darkest tint to very clear. Again Transitions lenses are extensively thought to be greatest in class within this regard.
Transitions lenses are a extensively held trademark for a certain (newest) technology of components and technologies which might be combined and sold under the "Transitions" manufacturer. Other (but related) names usually are not the same, and therefore are usually regarded to be not as great, as they may be from older era photochromatic technology.
Finally - do not anticipate your photochromatic lenses (regardless of which manufacturer or technologies) to make much of a difference whilst driving, because the windscreen of the automobile is developed to absorb most of the UV before it enters the cabin - hence the lenses inside your glasses have absolutely nothing to react with. In the event you need or would really like tinted lenses whilst driving, you happen to be far better off obtaining two pairs of the very same frame with prescription very clear and prescription tinted lenses.