Eyelids Won't Shut After Blepharoplasty

There are two different questions open right now... the first from aching eyes who has had a bleph approximately six weeks ago. The important issue for you at this point is your ability to protect your cornea.
A small amount of lagopthalmos (inability to fully close your lids over the globe) is not unusual immediately after a blepharoplasty. This typically resolves within the first few days and can be related to the local numbing medication and swelling. Lagopthalmos that lasts beyond that can be a concern in terms of full resolution.
Certainly most of these issues should resolve at six weeks. The critical issue if you can't close your lids is are you providing adequate lubrication and protection to your cornea. If the white parts of your eyes are not red and injected and you are not having pain this may indicate that you have adequate protection.
You should, however, have a conversation with your plastic surgeon.
To the second question posted in the comments section, 4 years is a long time to be unable to fully close your lids and you may need some form of intervention to correct this. A complete evaluation by a board certified plastic surgeon or occuloplastic surgeon is indicated. There can be many issues including that your upper lids are don't have enough skin or laxity to close or that your lower lid is somewhat loose and needs attention to correct.
I hope this helps.

This is a good question, because many patients are concerned when their eyes do not fully close immediately following blepharoplasty. Fortunately, this is normal for about a week. Beyond that, they need to see their surgeons, because the eyes can dry out and lead to corneal problems. Thank you for the question.

Poor closure of the eyelids
following blepharoplasty surgery is not uncommon and occurs for a variety of
reasons.  In the vast majority of
cases the problem occurs because of swelling and weakness of the orbicularis
muscles.  These issues tend to
resolve with time.  Rarely the
condition is caused by over resection of eyelid skin.  When this occurs secondary surgery is usually necessary and
may require skin grafting.

When eye closure is impaired
following surgery several steps should be taken to avoid damage to the
eyes.  These include lubrication of
the eyes with eye drops during the day and ointment at night, massage of the
eyelid and muscle exercises designed to strengthen the orbicularis muscles.

                  When
these maneuvers are utilized, most patients are eventually able to close their
eyes without difficulty and suffer no permanent damage to
their eyes.  If this complication
occurs it’s important to maintain close contact with your plastic surgeon so
that your situation can be monitored closely.