the day has finally come that i truly cannot drive without my glasses on. :\ i'm going to break down and buy a pair of prescription sunglasses next week, but i'd like to get some designer frames since now i'll be limited to only one pair of sunglasses. :\ does anyone have experience with buying designer frames at say Nordstrom or Saks then taking them to a binyons type place? i know i've seen some optomitrist office people kicking around here...is there anything special i need to look in the fames themselves if i'm going to switch out the lenses? any reccomendations on brands that hold up well or styles i should look at? i can't pull off oversized sunglasses. the only thing i've seen that might work for me the oliver people's pheobie and the chanel 5102s. and i only have access to a Nordstrom, a Saks, a sunglass hut an a binyons/lenscrafters. if it makes a difference, i only need single vision lenses (astigmatism). TIA!