Do you mean Social Security disability benefits?
yes
Those that have worked in jobs that social security cover and have a medical condition that meets Social Security's definition of disability can qualify for the benefit.
For those with a blind disability, what if they don't meet the legal definition of blindness?
If their visual problems alone or combined with other health problems keep them from working, then they still can qualify for disability benefits.
can you give me a TTY number to request an appointment?
Sure, you can use the TTY number 1-800-325-0778
For an adult child with a disability, is it necessary that they had worked before?
It's not necessary. The benefits the child would receive are based on the parent's earnings.
What would happen if a worker dies?