Eyes seem to have sunk back into my sockets. Is this enophthalmos or normal aging?

Eyelids come in two varieties: innies and outies. You have an innie eyelid. There are associated with a central levator disinsertion. Eventually, this can lead to upper eyelid ptosis and compensatory eyebrow elevation. This is evident on the right side where your eyebrow rides higher. If you use an eyelash growth serum, stop this immediately. These products contain bimatoprost (Latisse) or isopropyl cloprostenate (many over-the-counter eyebrow and eyelash products). The kill upper eyelid fat. If you stop, some of the fat comes back. Do not talk yourself into grafted fat or orbital implants for this issue. They are not right and will only harm you. You need an anchor blepharoplasty to make a new hard crease and repair the slipping levator aponeurosis in the upper eyelid. Sadly if you knock on enough doors, someone will do the horrible thing you are asking for and there will be no going back.