It is possible to develop asymmetry during healing or excessive scarring if you are prone.
You may experience difficulty in closing your eyes when sleeping. In rare instances this condition may be permanent.
If you have thyroid problems (hypothyroidism or Graves' disease) dry eyes or insufficient tearing, circulatory disorders or high blood pressure, having blepharoplasty may be more risky for you than an otherwise healthy individual.
Other disorders that may increase your risks are myasthenia gravis, cardiovascular disease, diabetes, a detached retina or glaucoma (and other high pressures of the eye), poor circulation and poor elasticity.
Sometimes the eye area will not heal correctly and you just may have to have an additional surgery to correct it.