Transitions, Reactions, Photochromic or Reactolight Lenses
New components and chemistry involved inside the most recent generations in the lenses have made substantial progress in addressing the 2 basic standards for choice :
More mature generations (and some current generations) keep a yellow or somewhat jaundiced hue even if not exposed to extremely violet light-weight (indoors for instance). The newest era Transitions are widely regarded to become the very best accessible and virtually completely obvious inside the absence of ultra violet.
Most newer photochromatic lenses produce a speedy transition from light to dark as they're uncovered to extremely violet - the genuine check as well as the differentiation is the rate at which they regress from the darkest tint to distinct. Once more Transitions lenses are widely regarded as very best in school within this regard.
Transitions lenses certainly are a widely held trademark to get a distinct (most recent) era of supplies and technologies which can be combined and offered beneath the "Transitions" model. Other (but equivalent) names usually are not precisely the same, and therefore are normally regarded to be not as very good, as they may be from older technology photochromatic technologies.
Ultimately - do not expect your photochromatic lenses (regardless of which brand or technologies) to produce much of a difference whilst driving, as the windscreen of the automobile is designed to absorb the majority of the UV prior to it enters the cabin - hence the lenses inside your eyeglasses have practically nothing to respond with. If you need or would like tinted lenses although driving, you might be much better off getting two pairs on the very same frame with prescription clear and prescription tinted lenses.