The strength of levator palpebrae superioris muscle and Mueller muscle may get weakened as one gets old, resulting in ptosis, or it may be congenital. Acquired ptosis could be caused by prolonged use of contact lens, chronic use of cosmetic glue, post surgical complications, trauma, and aging. To raise the eyelid with weakened muscles, one also uses the muscle of the forehead , resulting in wrinkle of the area, headache, or stiff shoulder. Severe prosis narrows the field of vision and make the daily life very difficult.
The operative method includes shortening of the stretched levator palpebrae superioris muscle for the ease of raising the eyelid. If this approach is not sufficient, the self fascia from the thigh may be transplanted.