Does nac-acetyl cysteine help relieve dry eye?

Mucomyst (acetylcysteine) This medication is helpful in prevent recurrence of filaments in severe dry eye but does not treat dry eye itself. See your eye doctor for appropriate dry eye therapy.
Probably not. Only reference i found for ocular use is to breaking up mucus. There are otc drops for dry eye, but if they don't work, see eye doc for thorough exam & treatment options.