Designer Eyeglass Frames

Designer brands for ladies’ Eyeglasses recommended?
hi, I’m looking for rectangular bold frame ladies’ eyeglasses (for age 20+), which designer brands would you recommend? Basically I’d want to look smart and decent, and I’m going to wear it everyday to school and work. Thanks.
p/s I am kind of a low-profile person.
prada – i normally detest this designer for WAG reasons! however, they have very nice understated rectangular Glasses that are not only uber cool but also v.sophis.