Get the right pair and you'll find they can work with many an outfit, from the very modern to the utterly vintage. A cat eye frame with rounded-out edges will work wonders for a square or diamond shaped face, while a round face can benefit from sharper edges or large frames that curve upwards subtly. All that said though, the rules are never hard and fast. Keep trying on pairs until you work out what's right for you.
If you want to make a strong statement, try a pair with diamond-shaped lenses that point sharply out. For an everyday pair, keep low-key and subtle with a slight flare out at the edges.
Specs have become the accessory du jour even for those who don't require them. So regardless of whether you wear glasses by necessity or by choice, remember that an on-trend pair are the way to go. And retro glasses are definitely the way to go right now.
Stay tuned :)