There are a few conditions which can cause this problem. Blepharochalasis is an inflammatory condition of the eyelids which causes fluctuating swelling and eventually leads to excess skin of the upper eyelids. Dermatochalasis is excess skin of the upper eyelids that happens due to the normal aging process. Steatoblepharon is also another condition that can be the cause of your fullness and this means that excess fat has developed in the upper eyelid again usually associated with aging (although this can be congenital ("with birth")). It appears from your pictures that you would benefit from an upper blepharoplasty to remove the excess tissue weighing on your eyelids.