When a power word, blind spell is cast, one or more creatures within the area of effect become sightless. The spellcaster selects one creature as the target center, and the effect spreads outward from the center, affecting creatures with the lowest hit point totals first; the spell can also be focused to affect only an individual creature. The spell affects up to 100 hit points of creatures; creatures who currently have 100 or more hit points are not
affected and do not count against the number of creatures affected. The duration of the spell depends upon how many hit points are affected. If 25 or fewer hit points are affected, the blindness is permanent until cured. If 26 to 50 hit points are affected, the blindness lasts for 1d4+1 turns. If 51 to 100 hit points are affected, the spell lasts for 1d4+1 rounds. An individual creature cannot be partially affected. If all of its current hit points are affected, it is blinded; otherwise, it is not. Blindness can be removed by a cure blindness or dispel magic spell.