According to scientific research symmetrical features are supposed to make people more handsome or pretty.
As an experiment I took a photo of someone’s eye then mirrored it. I tried to get the right width for the bridge of the nose. I have to say this looks strange. He does have uneven eyes in reality, with one obviously higher than the other.
The only other example of this I have seen was with a photo of Edgar Allen Poe. He has a very unsymmetric face and as with this experiment if you mirror the opposite sides the faces that result are truly weird, at least to me.