will dry eye resolve after lower blepharoplasty? It has been about 9-10 weeks

Dry eyes after eyelid surgery can be a common occurence. This can happen for a couple of reasons. The first reason is that the skin removed may make your eyes just generally open a milimeter or two for a limited time after surgey. This in itself can expose your eye to dry conditions that it didn't have before. Secondly, the glands tht make tears can be stunned after surgery limiting the lubrication of your eye. Lastly, the muscle and nerve to the muscle around the eye can be swollen or stunned. This limits your blink response which would usually keep your eyes moist. Keep your eyes protected and use lots of drops and ointment until it resolves. If it doesn't over the next few months then seek medical help. Best wishes.

Pictures would help to see if there is any obvious ectropion.  Many patients get some dryness after any eyelid surgery due to the inflammation in the glands.  This will resolve over a few weeks.  If you still have significant dryness you should see an oculoplastic surgeon to determine why you might be having problems.   

If the eyelids don't blink or close properly, then the eyeball is exposed to more air, causing dry eyes.  There could other causes as well.  See an ophthalmologist or oculoplastic specialist for evaluation.

Photographs of your post-operative appearance would be very helpful to address your question.  When external incisions are made, the motor nerves to the lower eyelid can be permanently damaged which may cause long term problems with moving tears on the corneal surface.  There can also be tethering of the lower eyelid tissues limiting the excursion of the lower eyelid which can contribute to these issues.  The examination of the eyes prior to eyelid surgery can help to identify preexisting eyelid and dry eye issue.  I recommend that you get assessed by a cornea specialist to address your dry eye issue.  Consider posting a photographs for a more detailed response.

Everyone develops dry eye problems TEMPORARILY after blepharoplasty. This usually passes quickly.This is because normal tear production is interfered with by post-operative swelling.The surgery does produce a small amount of permanent reduction in tear production, which in most patients is unnoticeable. However, in patients who are just on the edge of developing dry eyes before the surgery (this can be assessed by a Schirmer test pre-operatively), the result of this small reduction in tear production can lead to permanent dry eye problems.There are also other conditions which can cause dry eyes to develop, so I would recommend checking with an ophthalmologist for a complete eye exam.