 Northwest News Time 511. For those who use corrective eyewear, and three out of four adults in this country do, the choices seem pretty much endless. But shopping for those new specs and contacts can be a hassle and expensive. Herb Weisbaum, a contributing editor at Checkbook.org, has a little money-saving advice. It seems like there's healthy competition for eyewear, with dozens of major chains all selling dozens of brands of glasses, maybe hundreds of different frames. But here's a little secret. That competition