Disability is based on function, not diseases. A person may qualify for disability if the diseases decrease the function to a certain level. In vision, the best eye has to see 20/200 or worse and/or has a visual field of 10 degrees or less. It doesn't matter what disease(s) you have; so long as your function is decreased.
When a person apply for disability, they would have to go through an entire different disability examination.
Hope this helps and thank you.
The ADA laws were changed in Sept 2008 regarding functions. As a patient, what if I had a decrease in function that was not covered in before 2008?
Since the ADA was admended, should I be grandfathered under the new ADA in 2008?
I'm not sure how that works. I would think that the determination of your disability status would be based on what you are right now and based on the law at the time of your application, not past legislation.
Also, as far as I am aware, the new amendments which started January 1 served to broaden the scope of coverage. It should be easier now to be declared disabled.