There is a specific
DAS thread for WDW near the top of this board.
The first post in that thread is DAS FAQs.
'Eligibility' for DAS is not based on any specific diagnosis. In fact, the CMs don't want to know/don't ask your diagnosis.
Disney has always recommended an
ECV, wheelchair or other mobility device for people who are concerned about standing or walking in lines.
The reason is that a day at WDW includes a lot of walking, much of it outside of lines. There are also a lot of attractions that include a period of standing as a normal part of the attraction. Some of these are shows and some are attractions that load in 'batches' - like Soarin' and Haunted Mansion, which have standing preshows.
This is from Disney's page about DAS:
What is a Disability Access Service Card and how does it work?
The DAS Card is designed to accommodate guests who aren’t able to wait in a conventional queue environment due to a disability (including non-apparent disabilities). A Disability Access Service Card will be issued at Guest Relations main entrance locations and will offer guests a return time for attractions based on the current wait time. As soon as the Guest finishes one attraction, they can receive a return time for another. This service can be used in addition to Disney’s FASTPASS Service and Disney FastPass+ service.
Who will be eligible for a Disability Access Service Card?
Disney Parks’ goal is to accommodate guests who aren’t able to wait in a conventional queue environment due to a disability (including non-apparent disabilities). Guests should visit Guest Relations to discuss their assistance needs.
Does a Guest whose disability is based on the necessity to use a wheelchair or scooter need a DAS Card?
No, a Guest whose disability is based on the necessity to use a wheelchair or scooter does not need a DAS Card. Depending on the attraction, the Guest will either wait in the standard queue or receive a return time at the attraction based on the current wait time. For some attractions at
Disneyland Resort, these guests will go directly to an alternate entrance. Guests with additional needs should discuss them with Guest Relations.
And, with this, I am going to refer you to the WDW DAS thread and close this one.