Eyelift Surgery- As skin ages, it gradually loses its elasticity. A lack of elasticity, combined with the constant pull from gravity causes excessive skin to collect in the upper and lower eyelids. Excess skin on the lower eyelid causes wrinkles and bulges and on the upper eyelids an extra fold of skin forms which can hang over the eyelashes and obstruct vision.
Bulges in the upper and lower eyelids can also be caused by the fat that cushions the eyeball from the skull. The thin membrane that holds the fat in place weakens with age, allowing the fat to protrude into the lids.