What is causing my upper eyelid to look hollow near the orbital bone? (Photos)

A deep upper sulcus or sunken upper eyelid is usually due to stretching or tearing of the upper eyelid lifting muscle tendon (levator aponeurosis). This causes a drooping upper eyelid but some people can compensate sufficiently by raising their eyebrows. So upper eyelid range of motion (levator function) and degree of ptosis always need to be checked while canceling the action of the brow lifting muscle. If your eyebrows were in there normal position I would bet that you would have a significant amount of upper eyelid drooping. The other reason for believing this is the case is that I cannot see the crease where the levator inserts into your upper eyelids. Before going the route of fillers or surgery for hollowness it is immensely important that you are evaluated face to face by a qualified surgeon. Treatment without an accurate diagnosis can be quite problematic. I suspect that this has been going on for more than a few weeks.I hope you realize that this format of posting questions and receiving answers lacks the face to face direct communication required for you to make an informed decision regarding your surgery.
My response to your question/post does not represent formal medical advice or constitute a doctor patient relationship. You need to consult with i.e. personally see a board certified plastic surgeon in order to receive a formal evaluation and develop a doctor patient relationship in order to know if this assessment is valid.

Thank you for your question. You have loss of volume of the upper eyelid. This can happen in patients who have naturally deep set eyes. Looking at your photos, you may be a candidate for filler to the upper lid, but an in-person consultation would be needed to confirm that.