We have
www.babybanz.com sunglasses. We have them for my 5 yr old and for my 1 yr old. My son, the five year old, heavily prefers traditional sunglasses, unless he's upside down on the swingset or something. The baby wore them a little bit when she was about 6 months, but only if you kept her heavily distracted while putting them on. As soon as you went into any shade, she'd yank them off. Now, at a year, she pulls them off no matter what.
We live in southeast TX and I'd really prefer she wear them. But whatcha gonna do? Beat her?
As far as the sunglasses themselves? They are GREAT quality, look comfortable, don't leave red marks, were shipped fast, etc. I have no complaints about them.