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.
In general, if the ptosis is caused by a systemic muscle weakness, other muscles in the face, head, or body may be affected. A drooping eyelid can also be a symptom of a brain tumor or stroke, especially if it comes on within a few days or a few hours or if just one eye is involved.
As you are now probably aware, upper eyelid ptosis is a condition that causes the upper eyelid to appear to be droopy or give a person that sleepy-eye appearance. With this condition, the upper eyelid is lower than it should be (it either covers part of the iris or is very close to covering the iris) and this is caused by a weak eyelid muscle.