vary by what is bothering you the most. Overall, you have a very good result. No surgeon can promise you perfect symmetry and in ptosis surgery, the goal is to simply lift the lids off the pupils which has been accomplished. Without knowing what is concerning you, no options can be provided.
There are no pre-operative photos for comparison. It looks like you healed well and had a good result. The objective was not perfection. The objective was to correct the ptosis, a congenital medical problem. Your surgeon has achieved that. I am not sure what is meant by "asymmetry that wasn't necessary". You probably started with asymmetry, so your surgeon needed to perform an asymmetric procedure. That is not as easy as typical symmetric upper eyelid excess skin removal.You may benefit from minimal redundant skin excision on the right but you may end up chasing the preverbial tail. You had a good result. Give it at least a year before considering revision or touch up.
Your surgeon was able to correct the lid height. That is the most technically challenging part of the surgery. It appears that there is a small amount of extra skin on the right. This can be corrected easily with an in-office procedure. Best of luck.
You really don't look bad at all and the lid height is fairly even on both sides. The left eye is about 1mm lower than the right, and you have some asymmetry of the lid creases. This can all be corrected with a revision surgery.
I assume you are 6 months post op??? Than maybe skin excision on right only. In my over the internet opinion your ptosis correction is good...