Are polarized lenses better than photochromatic lenses for UV eye protection?
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When purchasing sunglasses we look for ones with lenses which provide protection against UV radiation. I asked my ophthalmologist and she advised having ones with polarized lenses and to put in the lens number of my specs which I use for distance.
I have heard about lenses which are polarized and those which are photochromatic. My queries are:
1. What exactly is the difference between these two types?
2. Do either of these types really offer 100% UV protection?
3. Is there any specific advantage of one type over the other for UV protection?
4. Is one type more expensive than the other?