Sightless Vision is a property possessed by some entities. An entity with Sightless Vision ignores the Invisible condition and Hidden property and may, at the DM's discretion, see through certain types of illusions and other false images. Additionally, an entity with Sightless Vision ignores any penalties or restrictions from illumination unless it also possesses Light Sensitivity.
See also: Sight, Darkvision, Low-light Vision, Lit, Dark, Shadowy