Our faces are asymmetric when we compare right from left. This is normal. Most of the time this is subtle, but if we really study our faces, we will see that our eyelids are not exactly equal, nor are our cheekbones or our jawline or other features. When there is marked asymmetry, it can become obvious. Occasionally time upper eyelids may droop (this might involve a condition known ptosis) and the visible eye (iris) seem smaller. Looking at a photograph shows the face the "world sees". But we are used to seeing the mirror image rather than the real image. So expect to find facial differences once you begin to study your face in more detail. For most things, don't worry. If there is a new glaring difference, consult a facial expert for a 2nd opinion.