Will I Be Able to Close my Eyes After Eyelid Surgery?

Typically, a small amount of gap is normal after Blepharoplasty.  This is temporary and related to swelling.  If it does exist it resolves between 1-3 weeks.  During that period of time, make sure your eye is well moisturized with lubricating drops and ointment to protect your cornea. 

Great question. You should not have difficulty closing your eyelids completely after blepharoplasty. This is generally an indication that too much skin was taken from the upper eyelids. If this is the case, you should let your surgeon know right away and measures should be taken to ensure the eye doesn't become too dry which can cause long term damage to your vision.
Hope this helps!Kyle Kimura, MDFacial Plastic and Reconstructive Surgery

It's unusual for patients to have difficulty closing their eyes following blepharoplasty surgery. When patients are unable to close their eyes immediately following this procedure, it's usually always related to swelling. Eye opening tends to improve with time as swelling resolves.Although it's unusual, patients may have persistent difficulty closing their eyes. This may be related to over resection of skin, damage to the levater mechanism and excess scarring. Under these circumstances, secondary surgery may be necessary.Fortunately, this complication is extremely rare. When patients are unable to close their eyes following eyelid surgery, it's essential that they contact their plastic surgeon as soon as possible. Under these circumstances, it's important to use lubricants and ointments to moisturize the eyes to avoid drying and corneal damage.