From D&D Wiki
|This material is published under the OGL 1.0a.|
Some creatures have the extraordinary ability to use a nonvisual sense (or a combination of such senses) to operate effectively without vision. Such sense may include sensitivity to vibrations, acute scent, keen hearing, or echolocation. This ability makes invisibility and darkness (even magical darkness) irrelevant to the creature (though it still can’t see ethereal creatures). This ability operates out to a range specified in the creature description.
- Blindsight never allows a creature to distinguish color or visual contrast. A creature cannot read with blindsight.
- Blindsight does not subject a creature to gaze attacks.
- Blinding attacks do not penalize creatures using blindsight.
- Deafening attacks thwart blindsight if it relies on hearing.
- Blindsight works underwater but not in a vacuum.