Will Blepharoplasty Affect my Previous Lasik Surgery?

You should be fine. You just need to make sure that the surgeon and the anesthesiologist are both aware that you have had LASIK surgery, so they can take extra precaution to keep your eyes lubricated and protected.

Dear Tingmm,
Lasik causes dry eye by cutting the sensory nerves to the corneal surface when the flap is lifted. It takes time for this to resolve.
The eyelid surgery can also exacerbate dry eye. A properly done eyelid surgery will have a minimum impact on the dry eye situation. Having said that, you need a proper assessment of the condition of the eyes prior to eyelid surgery. If your cosmetic surgeon is not prepared to assess and manage the dry eye condition, you will need assessment by a general ophthalmologist which could be your refractive surgeon. The timing of the eyelid surgery should be deferred to whoever will be responsible for managing the eyes.
What it the worst that could happen is the closure of the eyelids could be compromised by the eyelid surgery in a setting where there is reduced corneal sensitivity following Lasik. This could lead to corneal break down after eyelid surgery. This can initiate a melting syndrome of the cornea, or a frank corneal ulcer which is a baterial infection. For these reasons, it is worth your while to take your time, and heal from the lasik prior to undertaking eyelid surgery and not proceed with eyelid surgery until cleared by your ophthalmologist.