Causes and Treatment for Enophthalmos

I'm 18 and have enophthalmos. It didn't happen drastically but have been developing over the pass few years. The part of my eyelid and eyelashes near the nose sink inside and disappear. When viewed from the sides my eyes are far from the nose. It wasn't like that when I was young. My eyes were 'poppy'. Its not genetic because my parents don't have deep set eyes. Could it be loss of fat behind my eyeballs that cause them to sink into the sockets? If that's so how to bring back the fat to push them back to their position?