Blu-Block, but focal distance is way too close
I bought these to use for UV/Blue light protection and to magnify at a comfortable reading distance.  These definitely block blue light and I would give them 5 stars for that, but the focal length (distance between the lens and the object that you are trying to see) is about 12 inches.  That is way too close for comfortable reading which should be between 16" to 22".  Very disappointing.
Rating: 3 stars