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How do I identify that the lenses I brought are Transition lenses and not normal or fiber lenses?

I recently brought new spectacles with lenses made by Transition. How do I identify that the lenses made are by Transition and not any ordinary glass or fiber?

Public Comments

1. Step out side in the sun
2. take them outside and see if they change colors....?
3. Thats easy the transtion will turn dark outside on sunny days just remember they don't work inside cars you will need extra sunglasses for driveing. regular glasses will stay clear
4. There are other plastic photochromic lenses which are also available that turn dark when u go in the sun. The best way to differentiate them from transitions is that ordinary photochromics do not go as white/clear as the transitions do.(esp if its Transition 5 or 6) 5 & 6 are versions of transition technology. Transition is not a lens. Its a technology used to make white spectacle lenses to phtochromics. Transition can be with essilor lenses, zeiss lenses, hoya lenses etc etc. So if you buy a transition make sure your optician gives you an authenticity card of the original lens (e.g. Essilor crizal) and of Transition.