The disney character 'Sleepy' from Snow White and the Seven Dwarves was based on a friend of Walt Disney's who had myasthenia gravis. The droopy eyelids are characteristic if the myasthenic face and make the myasthenic look permanently tired.
Disney's classic Snow White and the Seven Dwarfs was re-released in 1952 and was the first time I got to see it . It was re-released again in 1958 & 1967 for mid and younger Boomers to be able to see it. When did you first see Snow White?