Are there any disadvantages with reaction lenses?!
Question:
Are there any disadvantages with reaction lenses?
Would it change colour if sunlight came in through the window while i am in the room?
Answers:
I think you're talking about Transitions (Photochromic) lenses. They get darker in the sunlight. In order for them to get darker there must be UV light. So they don't change much in the car because the windshield cuts out UV light. The same would probably go for the window in your room.
As far as a disadvantage, they normally get clear while inside but there's usually a slight tint. Also, compared to sunglasses, not changing in the car can be a disadvantage. They are not meant to replace sunglasses, only to subliment.