I had orbital decompression surgery done on both eyes at once back in March. The swelling lasted for about a week. I had no pain to speak of. I was back at work in less than a week. My surgeon suggested a wait of 4 months healing before scheduling further surgery. Unfortunately, 4 months is turning into 6 months since I had to have sinus surgery to correct a problem caused by the decompression.
I found that keeping ice on my eyes whenever possible helped a lot - did it for most of 5 days, until the ice pack they gave me in the hospital started leaking all over.
Good luck to you, try the ice if you haven't already, and I hope you feel better soon!
This has been discussed extensively recently including by several patients that have had the surgery. Use the search feature on this page and search "orbital decompression"
JCH III MD Eye physician and Surgeon