chal ‧ lenged /ˈtʃæləndʒd, ˈtʃælɪndʒd/ BrE AmE adjective
[ Word Family: adjective : ↑ challenging , ↑ challenged ≠ ↑ unchallenged , ↑ unchallengeable ; noun : ↑ challenge , ↑ challenger ; verb : ↑ challenge ; adverb : ↑ challengingly ]
visually/physically/mentally etc challenged American English used as a polite expression for describing someone who has difficulty doing things because they are blind etc