extremely aged, traditionally referring to people in their eighties or nineties

old age (typically referring to people in their 80s or 90s)

having the blurred or failing vision characteristic of old age

advanced age, specifically referring to the period of life in one's eighties or nineties

suffering from the mental or physical decline associated with old age

feeble-minded and senile

the elderly and the young

to be upset or disturbed

(literary) one's 80s or 90s