Why are free form lenses available in inly hi-index materials? Does this make any sense since CR39 is the clearest of materials to begin with? The answer I got from one rep of a company with a free form product is that CR39 is clear enough as it is so it doesn't need the free form as much as the 1.60 or 1.67. That answer is somewhat ridiculous. What does anyone else have to say about this ? :angry: