How long after strabismus surgery does one need to wait before eyelid surgery?

I've had a total thyroidectomy in Nov 2010. In 2012, I had separate decompressions for each eye via sinuses (ENT surgeon). 4 months later I had emergency bilateral decompression from the outside of the eye (Occuloplastic surgeon) and was told they removed as much bone as possible. 6 months later I had emergency radiation therapy and was put on steroids for the third time. In Aug 2013 and Nov 2013, I had bilateral strabismus surgery and have a third surgery scheduled for Apr 2014.