The front neck shaping is worked with decreases and increases (see photo below and page 2 of pattern). Sweater has optional crochet edging around neck, cuffs and hem. This sweater is a wardrobe staple worth having in more than one color, and it is a fast knit! (from pattern description) Also available on Craftsy.
However, ptosis of the upper eyelid can be a symptom of several health conditions, including diabetes, diseases of the nervous system such as myasthenia gravis, or damage to the third cranial nerve that controls the eyelids. Myasthenia gravis is a serious autoimmune neuromuscular disease that results in nerve weakness.
Facial droop is sagging of the face caused by loss of facial muscle tone. This is usually caused by an impairment of nerve function that supply the facial muscles, particularly involving the facial nerve. Most cases of facial droop are one-sided (unilateral) causing a distortion of the normal face structure.