Sunglasses draw attention to your face, and thus you need a pair that highlights your best facial features while at the same time minimizing the impact of your less-than-stellar features. For example, if your face is round, it is advisable to wear sunglasses with geometric-cut or angled lenses as opposed to rounded ones. The reason is that wearing round sunglasses will highlight the roundness of your face, making it appear even rounder. Conversely, sunglasses with, for example, rectangular lenses will help to create a rough contrast to your rounded features. The focus would be on the sunglasses or on your eye area and not on your entire face.
Sunglasses can also make a great cover-up if you want to deemphasize a certain part of your face. One of the most common facial features that people try to cover-up is their noses. Simply put, people with a large nose are usually self-conscious, and will often do whatever it takes to draw attention away from it.
If you happen to have a large nose, you can wear sunglasses that will counteract its impact. For example, style and fashion experts recommend going for a pair of sunglasses with large, wide frames. Since the frame will hug your cheekbones and wrap all the way to your ears, the thicker the frame is, the more attention it will draw away from your nose.
Similarly, sunglasses with larger-than-average lenses can also help minimize the impact of a large nose. This makes sense if you think about it because everything is relative; for example, a baseball will look large compared to a pea but small compared to a basketball. The same principle applies to the size of your sunglass lenses relative to the size of your facial features.
The bottom line is that your sunglasses are a fashion accessory, and as such can either deter from or complement your overall look. Whether you are partial to Matrix sunglasses or some other type, pay attention and make sure you get the sunglasses that look best on you.