Student or Learner
While my brother has excellent eyesight, he ..... hard of hearing.
I'm not familiar with this structure: Be hard of sth ( No.2). Is this sth like expression?
Does it( this expression) belong only to "hearing problem or loss"?
As far as I know, "to be hard of" is only used with "hearing". Don't try to use it for any other physical deficiency.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.