Where we state with regards to the getting started licence:
You have no rights to develop software for medical solutions or medical equipment. For this purpose, you need a Research or Commercial license.
Accordingly, as your application is tailored toward disabled users, this most likely comes under the category of a medical application.
So for distribution, we would recommend you reach out to the licencing team @ https://developer.tobii.com/license-agreement/contact/
about a quote or if they can offer any flexibility in this matter. Best Wishes.