Swollen Eye Lid 24 Hours After LASIK?

I had LASIK eye surgery on Friday evening. ~24 hours later my upper lid on one eye (I had treatment on both eyes) became a bit swollen & it still is today (Wednesday/5 days later). It's not really dramatic but enough to make my eyes look uneven. My ophthalmologist says it's not an allergic reaction, but I want to know how long this will take to subside and if there's anything I can do to speed up the process? No pain or redness. Swollen lid feels a bit heavy but otherwise my eyes feel fine.