Transitions, Reactions, Photochromic or Reactolight Lenses
New supplies and chemistry concerned in the latest generations of the lenses have made considerable development in addressing the two fundamental requirements for choice :
Older generations (and a few current generations) keep a yellow or somewhat jaundiced hue even when not uncovered to ultra violet light-weight (indoors for instance). The latest technology Transitions are broadly regarded to be the very best offered and nearly totally clear inside the absence of extremely violet.
Most more recent photochromatic lenses make a rapid changeover from gentle to dim as they may be exposed to ultra violet - the genuine test and also the differentiation may be the rate at which they regress from the darkest tint to distinct. Again Transitions lenses are widely thought to be best at school in this regard.
Transitions lenses really are a broadly held trademark for a certain (most recent) generation of components and technology which might be combined and sold below the "Transitions" brand name. Other (but related) names aren't the same, and therefore are generally regarded to be not as very good, as they are from older technology photochromatic technologies.
Ultimately - do not expect your photochromatic lenses (irrespective of which model or technology) to produce much of a difference while driving, as the windscreen of the vehicle is created to soak up many of the UV before it enters the cabin - hence the lenses in your glasses have absolutely nothing to respond with. In case you need or would like tinted lenses although driving, you are greater off acquiring two pairs from the identical body with prescription clear and prescription tinted lenses.