Those who are looking for the advice of a plastic surgeon might think that they need to make their face more symmetrical, but symmetry isn't the same thing as beauty.
When people consider any sort of cosmetic procedure, they almost always think of making their face look more symmetrical. Symmetry is not a synonym of beauty by any means. The most ideal form of beauty might not even necessarily be symmetrical.
Some people actually find asymmetry to be even more ideal. Research into what makes faces attractive has given us a few clues as to why this might be the case.
Human brains naturally like symmetry. Most people find it to be comforting, calm and soothing. However, we're also drawn by our nature to things that are more complex. New and interesting patterns provide a combination of visual stimuli with the same sort of calming influence that symmetry provides.
This might help to explain why some asymmetrical facial features are actually seen as more beautiful. New experiences are often considered attractive in their own right.
One study used photographs of faces where scientists had manipulated the images to make the faces more asymmetrical without actually changing the sizes of the people's features. Participants in the study then rated each of the faces and judged them on attractiveness. The scientists that conducted the study assumed that the volunteers would rate the most symmetrical faces as the most beautiful.
They were surprised to learn that this hypothesis was actually inaccurate. Many of the more asymmetrical faces were actually rated above those that were considered the most symmetrical. We now understand that the human brain is far more complex than this. There are dozens of aesthetic reactions to different facial features. In fact, there are more than we could ever hope to count.
The way that the human brain understands and processes visual stimulation is unique for certain. One thing is for sure, however, and that's the fact that symmetry doesn't equal beauty.