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.
When the skin loses its elasticity, gravity causes drooping of the eyebrows and eyelids, looseness and fullness under the cheeks and jaw (jowls and double chin), and longer ear lobes. Facial movement lines become more visible after the skin starts losing its elasticity (usually as people reach their 30s and 40s).