Broadly speaking this symptom for the upper eyelid, which covers the eyeball, is sagging above the eyes.
The causes of sagging above the eye are divided into several classifications as shown below.
The main treatment is to remove the sagging skin.
Asians genetically have much fat surrounding the eyes and the relaxation of the fat supporting tissue with aging causes the fat to droop.
The drooping upper eyelid fat covers the top of the eyeball and is recognized as sagging above the eye. The main treatment is to remove the superior orbital fat.
With age the muscle that opens the eye (upper eyelid elevator muscle) begins to relax making the eyelid seems heavier. This condition is called senile ptosis. The treatment is to shorten the upper eyelid elevator muscle to improve opening of the upper eyelid.
Please note that aging is not the only cause of eyelid ptosis as there are several causes. For details, please see the page for eyelid ptosis.