How can I fix my uneven face? (Photo)

Three-quarter and profile photos would have been additionally helpful. However, from the frontal view provided, it does appear that you might benefit significantly from the use of volumizing fillers to shape and contour your face and to achieve greater symmetry between the two sides. The photo suggests that the posterior angle of the jaw region on YOUR left side is less well defined than on the right. So, to improve and balance the overall "frame" of the face, a volumizing filler, such as Voluma XC, which I would use in my NY office (or Volyme, which I would use in my Israel satellite facility), would help to balance the asymmetry. The photo also clearly indicates that YOUR right cheek possesses less projection than your left. Here, too, I would use Voluma XC (NY) and Stylage XXL (Israel) to correct this deficit and establish better contour and proportionality between the cheeks. Finally, there is also suggestion of some chin retrusion and flattening, which also can affect the overall framing of the face. If this is indeed so, I would suggest a nonsurgical chin augmentation using Restylane Lyft (NY) and Hyabell Deep (Israel). You would be wise to seek consultation and treatment by a board certified aesthetic physician with experience and expertise in nonsurgical facial rejuvenation and augmentation and be certain to ask to see his/her before and after photos before agreeing to proceed. Best of luck. 

Both implants and fillers in the cheeks can create good results for patients.  Both can build up the cheeks and create symmetry.  You must balance the pros and cons of each procedure and do what you feel is the best decision for you.
Fillers:
Pros: No downtime Reversible Quick
Cons: Temporary More expensive in long run
Implants Pros: Permanent Great for patients with poor bone structure Less expensive overtime
Negative: Risks associated with surgery Possible infection Downtime
I hope this helps.

Symmetry and contouring of the face can be improved with well-placed fillers (Voluma, Radiesse, Bellafill) and Sculptra. Fat or implants are alternatives. I recommend getting a formal evaluation with a facial sculpting expert. Best, Dr. Emer