Two of my elderly aunts had what is called drooping upper eyelid or upper eyelid ptosis.I remember how tired they always looked. It is quite different from lid lag. In many cases of lid lag, the thyroid is involved. With eyelid ptosis, cataract surgery, accidents, or mechanical dysfunction are likely causes.
In many cases, people with drooping lids don't notice the problem in the early stages. There are definite symptoms that worsen as time goes on - a high fold in the upper eyelid, many wrinkles on the forehead, problems with vision, and deterioration in facial appearance.
At the present time, surgery is the only way to effectively manage this problem. There are a number of different procedures that can be used depending on the degree of severity.