There are a ton of cut-price opticals in Pacific Mall, but I always come to 88 Optical even though the prices aren't great here (hint: you can haggle, sometimes down to 30% off.... unfortunately not as much as the others who seem to go down to 50%)
The owner is great, and his staff is generally quite attentive. The store also has all sorts of cutting edge styles here (the last time I passed by, some Cutler and Gross thick frames with a newspaper finance pages pattern to it. Awesome.)