Blindness is a condition in which a character cannot see. Typical game effects of blindness are:
- Screen modification: If the player character is blind, non-permanent aspects of the map (such as monsters) may not be shown.
- Combat impairment: The blind character may suffer a penalty or penalties in combat.
- Restricted actions: The blind character may be unable to use missile weapons or cast spells. It is very typical that the character will be unable to read a book, scroll, or other writing while blind.
- Message modification: Text messages for the player may be changed when his character is blind. For example, when hit by a fire ball, the message may change from the normal "The horned elf mage casts a fireball! You are engulfed in flames!" to "You hear elvish chanting. Suddenly it is painfully hot!".