i have to second Liz on this; i don't care for that label "disabled". my car sat for 6 yrs in the yard and became 'disabled'. i'm challenged: hypoxic, drag a tank of oxygen, have limited mobility, am obese, brain damaged, very short and i still am ABLE to do most things for myself, (if they don't take too long, reach too high, require running or math)

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everyone i know has 'challenges'. don't think that just because some doctor hasn't fitted you with an obvious aid, or you don't behave in a way that it's obvious you aren't nearly average, that you aren't limited in some (often many) ways. so treat others as you would want to be treated. and if someone doesn't treat you well, consider it one of their limitations.
this tree is over 4500 yrs old, and so very limited....