Anton's syndrome

Anton's syndrome : A rare form of anosognosia in which a person who is totally blind, usually as a result of extensive damage to the visual cortex or the optic nerves, is unaware of the blindness, typically either guessing at the appearance of objects from non-visual cues while believing that they are being perceived visually, or believing that for some reason the surroundings are plunged in darkness.An excuse such as"I lost my glasses" may be offered..