Three years ogo he got mile brain stroke . he now can't identify anyone ,even his wife .his age is 80 years .what is the solution for this ?

Prosopagnosia: It is called prosopagnosia and usually the result of a posterior circulation stroke. There is no real solution other than time and therapy and sometimes deficits following stroke can improve but sometimes not. While a stroke is a common cause of this condition, there are other etiologies and he should seek care from his neurologist.

Might help: May well possess a vascular dementia, or even mixed dementia with Alzheimer's. Memory enhancing agents such as donepezil or memantine might help. Discuss these approaches with your doctor.