Sunglasses Shopping

I have one pair of sunglasses that I've had for ages. The screws are loose on the flights and they fall off my face whenever I lean over the tiniest bit, and if I'm carrying something with both hands and walking I can't wear them because the frustration at them slipping down my nose the entire time is infuriating. So I went to the local sunglasses store and tried on several. Their selection was good, but I was picky. After 10 minutes of shopping, I chose a pair but decided to wait on it for a day or two. I looked them up online when I got home only to find out that they were an oversized pair of women's sunglasses. It would have been nice if the clerk had told me, but at least I didn't buy from him.