I like to wear sunglasses when going to shops, the hospital, etc, places that are usually brightly lit - What do you feel is a good compromise between their ability to block light and the ability to still see clearly in the not so bright indoor areas? They are prescription glasses so I have a different issue if I just remove them in the not brightly lit areas (my current sunglasses block 85% of light, they are fine outdoors, but i find they are a bit too dark in general for indoor use - fwiw I always wear a hat that blocks direct overhead light)