Symmetrical Portraits

I want to try and emulate these portraits by Julian Wolkenstein,though I intend to include straight-on, expressive portraits to demonstrate the contrast between how we actually look and how we would look with perfectly symmetrical faces. In the images I've already shot, my models have been wearing visible clothing, which is different from the portraits I'm emulating. I've never used Photoshop to mirror images, so I'm wondering how this might affect the aesthetic of the photos.