I purchased a pair of glasses, Transitional Lenses, November 24, 2009 and last month I discovered that the lens was cracked. I took them back to walmart vision center and they stated that the would replace the lens. They did that, but the lens that they replaced would turn darker than the other lens. They proceeded to tell me to place the glasses in the freezer for a few days. I did this and it didn't help. I took them back and they placed them in a freezer for a few days. When I got them back, they werethe same as before. They refused to... read full review »