Guillermo Robles took on two major pizza companies, claiming in lawsuits that the chains discriminated against him and others who are blind or visually impaired and cannot order pizza from a website or mobile app.

Robles, his attorneys and advocates for the blind cite such barriers as a violation of the Americans With Disabilities Act, which requires businesses to accommodate people with disabilities in “places of accommodation.”

Uncertainty over the scope of ADA protections has only increased in recent years, sparking a wave of lawsuits that seek to push the reach of the law beyond entrance ramps and bathroom access for people with disabilities.