The transition lenses become darker in bright light outdoors so you get the sunglasses effect outdoors in bright light and
backBack pain - low
Back strain treatment to
clearClear by design
Clear eyes
Clear eyes acr
Clear eyes clr lenses inside in regular light. The lenses will not harm you - so don't worry about that. I think it is totally understandable why they cost more - and it is a lot more complicated that just some added chemicals. You are way oversimplying it. It is a complex patented process and yes you need to take good care of the lens especially if there is an antireflective coating. It is often the anti-reflective coating that gets messed up easily if you clean lenses improperly.
One last thought - these lenses usually wont darken much inside your car because the windshield filters out most of the uv light. I, myself am not a big fan of transition lenses but many people like them - but still have some of your complaints.
MJK MD
MJK MD