The character becomes certain that it is completely and utterly blind. It will not gain the blinded condition but will avoid doing activities usually requiring sight (long-ranged weapons, reading a scroll, evading a hit, etc.
). However, it doesn't dislike its fake blindness and will try to gouge out other creatures' eyes, not out of malice, but to help the poor souls that have not been blessed by the perfect darkness that embraces it. When no creature within 100 ft. of the character has their sight, the character will gouge out their own eyes.
The world dissolves into an impenetrable void, shadows stretching where none exist. You navigate by instinct, hands brushing textures unknown. Others’ eyes gleam like cruel lanterns—marks of a sight they must be freed from.