I want to buy a pair of progressive polarized sunglasses, but the optician asked me for $300 dollors for them! That's really much too expensive, he explain that, the process was very complex, is that true?

That's true, the process is really complex, it is hard to press a polarized coating in the progressive lens, thus why they are always very expensive, but I suggest you www.cheapglasses123.com, which provides you eyeglasses with high quality but with cheap price! And it has a great reputation at this field!