I would consider a small surgery where I release the lower eyelid retractors. This allows the eyelid to naturally elevate. The release is done from a small incision on the inside of the eyelid. What this does is it creates more a space between the muscles and their attachments....
Juvederm can work reasonably well in this area and may last 6-9 months. You may consider several treatments with juvederm, but may want to consider fat grafting to that area for a longer term solution. Fat grafting can fill the concavity, will last much longer and should remain for many years.
From this photo,I think there is a very small difference that can be attributed to normal asymmetry. Not a single person is perfectly symmetric. That being said perhaps a consultation in person would help your surgeon assess exactly what bother you.