I think all of you do not know what is behind term "malar osteotomy" it is mobilising the whole zygomatic bone. Part of this bone creates orbital floor, hence orbital volume may change what may cause enopthalmos. And at least 50% of maxillo-facial surgeons (even very experienced, well known) won't do this on you.
The alternative method (not as effcient as full malar osteotomy, but more safe) is zygomatic sandwich osteotomy which can be used (I do not know how, I gave link, you have to buy this article, or find full version) to treat kinda recessed cheekbones probably in 2 directions.
Of course implants are 3rd option
PS If you find such surgeon who has performed a lot of malar osteotomies please let me know. Now I know only Prof. Iannetti from Rome (he has at least documented this)