You have a mild left upper eyelid ptosis. This can be addressed with subtle surgery. There are two methods to achieve this:
1. Internal ptosis repair. In this method there is no external skin incisions. The eyelid is flipped and the muscle is tightened from the back side of the eyelid.
2. External ptosis repair. A skin incision is made and the muscle is advanced/tightened from the front.
For your degree of ptosis [subtle], the internal ptosis repair is my preferred technique as it is slightly more predictable and has less risk for contour irregularity. Find an Oculoplastics surgeon that is experienced in both techniques.
If you decide to explore this further, I would recommend consultation with an ASOPRS trained Oculoplastics surgeon. You can find one close to you on the ASOPRS dot org website.