Cinema audio description is a fantastic service for people with sight loss. The normal film soundtrack comes through the cinemas surround sound speakers in the usual way, whilst a recorded narrator explains what's happening on screen - in gaps in the dialogue - through personal headphones.
It's similar to listening to a cricket or football match on the radio - having the action described to you - but with added surround sound, which places you in the middle of the action. Most popular cinema releases are now available with audio description tracks.
Just ask for an A.D. headset at the box office. The audio description is broadcast through personal headphones - only the wearer hears it.