SAN FRANCISCO, CA (NBC NEWS) — Do movie theaters discriminate against the blind? A federal class action lawsuit against the nation’s largest movie theater chain may provide an answer.

AMC Theatres is being sued by a group of blind movie patrons who claim that AMC fails to provide working audio-description devices for visually impaired kids and adults, according to NBC News.

The lawsuit claims the theater’s audio-description devices, which consist of a headset and audio track that relay key visual elements of the movie, are often broken or have dead batteries.

The lawsuit also claims employees often hand out devices meant for the hard of hearing, and that management fail to train the staff on maintenance, set-up and use of equipment.

AMC did not immediately respond to an NBC News request for comment.Click here to read more.