Generally yes, Scientist believe that a face should be perfectly symmetrical, using the golden ratio as a guide. I would call it perfect, but I would not call it beautiful. Beauty is in the eye of the beholder. Some people find that the "flaws" are what makes a person much more attract, for example, having bigger lips might be more attractive to some then others. You can call some one's face perfect, but you don't have to think it's beautiful.