[Michel de Montaigne (1533-1592): report of a case of not perceiving own blindness].

In the second book of the Essais towards the end of the twelfth chapter Montaigne mentions a nobleman who does not take note of his blindness. This case of not noticing his own blindness is presumably the first ever described. It belongs to the complex of anosognosia symptoms among which must be emphasized the Anton syndrome. The invalidity described by Montaigne means for him a crucial point of his critique of senses and thus of his doctrine of natural cognition.