The position of the eyebrows often descends with age as the skin on the forehead becomes loose and the underlying muscles weaken. The result is an eyebrow that may sit below the palpable bone of the eye socket and an excess of skin falling onto the upper eyelid. Removing the excess upper eyelid skin on its own does not fix the problem and in some circumstances can encourage the brow to fall even further onto the eyelid. A brow lift is also useful to correct the unilateral descended brow in the patient with a facial nerve palsy.
There are several techniques to lift the brow and keep it in the new position:
This uses 3-5 small incisions hidden in the hairline that allow a camera to be passed under the scalp to elevate the eyebrows. The scalp is held up by hidden anchors to the bone of the skull.
This technique uses a long incision that runs over the scalp placed behind the hairline to allow direct access to the brow. This facilitates the most dramatic lift but at the expense of a long scar and numbness in the scalp.
An incision is placed within the hair of the temple that allows the outside of the eyebrow to be lifted only.
Further information about this procedure can be found here