Is fat embolism a risk with fat transfer to chin?

I don't know if eyelid surgery is necessary based off of these photos, but I do think you could do with additional volume to the midface, especially medially (like under the eyes). This can be achieved with either filler or fat. It may be related to the weight loss but it'd be hard to know for...

You can expect a 20%-30% retention of fat at 1 year. At that point a 2nd session may be needed and then you can expect a higher retention. The best thing about facial fat transfer is that of all the fillers it is the most natural.

PRP (Platelet-Rich Plasma), micro fat transplant, and stem cell SVF (Stromal Vascular Fraction) fat transplant are different techniques used in fat grafting procedures. PRP involves using a concentrated form of the patient's own blood platelets, which are rich in growth factors. These growth...

You have a tear trough deformity and facial aging consistent with your age. A fat transfer is a great option at your age.

Fat is readily available and there is an endless supply so correcting to full correction is always possible unlike with expensive and temporary fillers. It works well to augment the facial skeleton. Cheek implants do erode the bone and can look unnatural over time.

Fat transfer, in good hands, can achieve wonderful results and is very effective in achieving a youthful look. It is important that you go to a person who has an excellent eye and shares your vision for the best results. Best of luck !