First of all, no surgery. Cheek implants, or lower lid surgery, would be a mistake and would likely end up with a poor result. Similarly, you have beautiful full cheeks, so additional volume there would either look unnatural, or would still not influence the area you are considering.To me, it looks like you are picking up on the transition of the muscle fullness of the lower lid and the soft tissue directly under that. That leaves you with four options. One is very small amounts of botox in the lower lid muscle to soften their prominence. You need to find someone with experience here, because it's precise and overtreatment will compromise your lower lid support. Two, soft HA fillers like belotero or restylane to bridget the transition. Again it must be conservative or you could look too puffy or lumpy. Three, a combination of the two. Don't do that at the same time, stage them to be conservative, simple, and safe (you may not need the second arm of treatment). And four, do nothing. You have beautiful eyes and cheekbones that we would try to copy for those less fortunate, so no treatment at all has to be considered.