When a married couple where both parties are over the age of 65 file their taxes married jointly (in the U.S. 2021): would the additional standard deduction for those over 65 in the amount of $1,350 be deducted per person? Or is it $1,350 for the couple altogether?

Also, under the same circumstances where there is a couple 65+, but one of the individuals is a blind person what would the additional standard deduction be in this case?