Visual impairment makes it difficult to read displays and markings, especially in low light conditions.
Liquid crystal displays can be very difficult to read and visual prompts such as on payphones may be unreadable.
|Visual contrast key legends||High contrast display|
|Standard key layouts||Large character display|
|Enlarged keys||Key feedback - audible.|
|Tactile key markers||Synthetic speech display|
|Plug-in keyboard||Plug-in display|