9 weeks post upper/lower blepharoplasty and I still have severe chemosis on one eye. Will this heal and how long will it take?

Although it can happen with any surgery around the eyes (and to any plastic surgeon for this matter), chemosis develops most commonly if lower blepharoplasty has been part of the procedure. If only the upper lids have been operated, it is very rare. If additional procedures have been performed such as canthopexy, canthoplasty or midface lift, chemosis may be more common.
Although after 9 weeks, understandably, most patients and surgeons lose their patience, chemosis will resolve. Many physicians may add steroids to the "mix" of treatments, I tend to believe that still less is more as there is no good scientific data that it actually will help the underlying condition of lymphatic drainage compromize. And any medication has their risk, too.
You are doing the right things! Stay in touch with your surgeon and we all hope for a quick resolution.

Thank you for the question. Chemosis is the swelling of the conjunctiva (the mucous covering of the eye.) It occurs on occasion with lower eyelid surgery. Treatments often tried are cold compresses, chilled artificial tears and steroid eye drops. It usually resolves within a few months. Chemosis is not a sign that the surgeon performed the operation improperly. 

Chemosis is a condition of localized swelling usually in the outer corner of the eye and is usually associated with lower blepharoplasty. Although not rare, it is not that unusual and can happen about 5 to 10% of time. Fortunately, it usually resolves in several days. The treatment initially usually consists of lubricating eyedrops and possibly steroid drops along with taping of the corner of the eye. Sometimes, the standard type of Visine can help. In rare instances, a small surgery can be performed to improve this. In general, however, one would usually wait 2 to 3 weeks as the swelling usually subsides on its own.

Chemosis after eyelid surgery, or what I call jelly eye, is very common, but it should have resolved by now. You should see an eye doctor. Occasionally, Chemosis has to be surgically removed.

                  Chemosis
occurs in a small percentage of patients following blepharoplasty. This
condition is related to swelling of the lining of the eye which is known as the
conjunctiva.

                  The
condition usually resolves spontaneously, but may last for several months.
Treatment usually involves lubrication of the eye with topical agents to
prevent drying and occasionally topical steroids. When the condition persists,
an ophthalmology consultation is appropriate. 

Chemosis is a common problem after eyelid surgery, and affects 5-10% of patients. In some cases, it may persist for weeks or months. It sounds like you have been doing all the right things (drops, usually containing a steroid; lubricant ointments).  Antibiotics are useful if there has been any damage to the surface of the eye, to prevent infection. In particularly difficult cases, sometimes the eyelids need to be temporarily closed, using a special type of stitch (tarsorraphy). In severe cases, an experienced ophthalmologist can actually lance the area and drain some fluid. A second opinion would be a good investment.