Of course You must earn at least 40 Social Security credits to qualify for Social Security benefits. You earn Social Security credits when you work and pay Social Security taxes.
can you please tell me the number of credits needed for retirement benefits
were you born after 1928?
no
What happens when it comes to legal blindness?
in that case there is no recent proof of work requirement.
Can you tell me the amount of credits needed for survivor benefits?
The number of credits needed for family members to be eligible for survivor benefits depends on their age when they die. The younger you are, the less credits needed.
Are you already receiving retirement or disability benefits at the time of your death?