Transitions, Reactions, Photochromic or Reactolight Lenses
New materials and chemistry concerned within the newest generations of the lenses have created considerable development in addressing the 2 basic requirements for choice :
Older generations (and a few current generations) retain a yellow or somewhat jaundiced hue even if not exposed to extremely violet light (indoors for instance). The most recent generation Transitions are extensively regarded to become the very best obtainable and nearly entirely clear in the absence of extremely violet.
Most more recent photochromatic lenses produce a rapid changeover from light to darkish as they are exposed to ultra violet - the actual test and also the differentiation may be the rate at which they regress in the darkest tint to very clear. Once more Transitions lenses are extensively thought to be very best in class within this regard.
Transitions lenses certainly are a broadly held trademark for a distinct (latest) era of components and technologies that are combined and offered below the "Transitions" brand name. Other (but similar) names aren't exactly the same, and therefore are normally regarded to become not as great, as they are from older era photochromatic technology.
Ultimately - don't anticipate your photochromatic lenses (irrespective of which brand or technologies) to make a lot of the distinction while driving, as the windscreen of the auto is designed to soak up the majority of the UV before it enters the cabin - therefore the lenses in your eyeglasses have nothing at all to respond with. In the event you require or would like tinted lenses even though driving, you are far better off obtaining two pairs of the very same body with prescription clear and prescription tinted lenses.