Should I do a 3rd ptosis surgery to correct the asymmetry? (photos)

Good morning,
Ptosis repair can be tricky, especially if it is your 3rd+ surgery. Every time you do surgery it can create more scar tissue and make subsequent surgery more challenging. That being said, doing surgery to correct the above is still possible, but it is important to have an expectation that thing still might not be perfect/completely symmetrical. You may want to consider seeing an oculoplastic surgeon for future repairs given the complexity of the situation.
I hope this helps!

Yes, it appears that additional surgery would be required to improve the uncorrected ptosis. Probably an anterior approach will provide the most powerful and most predictable result. I am sorry that you are requiring several operations to get the result that you desire. Such is the nature of ptosis surgery (and all plastic surgery as anyone who spends time on this site appreciates).