Quoted from TheLaw:tendonitis
I think TheLaw was thinking Tinnitus, but from talking with Steve he actually has Ménière's disease which causes the deafness: https://en.wikipedia.org/wiki/M%C3%A9ni%C3%A8re%27s_disease
My mom was diagnosed with the same thing so we chatted about it a while last time I saw him. Any clues he is working on Star Wars next?