My mom sometimes feel numbness in the whole right side of her body making her unable to move with halos around ryt eye and blurred vision.

Does not sound good: Far too few specifics offered but, at face value, is consistent with possible tias. Most strokes are missed. In ones which are symptomatic, commonly symptoms affect one side of body, opposite side of brain affected. If also weak, not just numb, stroke (cva; medical jargon) more likely. Advise seek out good help, probably quickly if acute onset, in hope of stopping possible further damage.