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.
Snow White and the Seven Dwarfs Thomas Kinkade Studios Art
I got Dopey! Which One Of The Seven Dwarfs Are You? Test (your a clumsy mess, your not the smartest crayon in the box, and oh yea you don't even have a beard) this is accurate :)
Filmic Light - Snow White Archive: 1938 Snow White and Seven Dwarfs Standees
EK Success - Disney Collection - 3 Dimensional Stickers with Foil Gem and Varnish Accents - Seven Dwarfs disney characters