Transitions, Reactions, Photochromic or Reactolight Lenses
New supplies and chemistry involved inside the newest generations in the lenses have made substantial progress in addressing the two fundamental criteria for selection :
Older generations (and a few current generations) retain a yellow or slightly jaundiced hue even when not uncovered to extremely violet gentle (indoors for instance). The most recent era Transitions are broadly regarded to become the most effective offered and practically fully distinct in the absence of ultra violet.
Most more recent photochromatic lenses produce a rapid changeover from light-weight to darkish as they may be uncovered to extremely violet - the real test and also the differentiation is the price at which they regress from the darkest tint to very clear. Once more Transitions lenses are widely thought to be ideal at school in this regard.
Transitions lenses certainly are a broadly held trademark for any specific (latest) technology of supplies and technology that are mixed and sold beneath the "Transitions" manufacturer. Other (but similar) names will not be precisely the same, and are normally regarded to become not as very good, as they are from older technology photochromatic technologies.
Ultimately - do not expect your photochromatic lenses (irrespective of which model or technologies) to make significantly of the distinction while driving, because the windscreen of the auto is developed to absorb many of the UV before it enters the cabin - hence the lenses inside your eyeglasses have practically nothing to respond with. In case you require or would really like tinted lenses even though driving, you happen to be greater off acquiring two pairs in the very same body with prescription obvious and prescription tinted lenses.