the blindness of a person can
stem from two sources, one of those is fixidity, he just never spans his
attention and the other one is
overts. An
individual who has
committed overts long enough and often enough on a certain
area will not be able to perceive it anymore. He just doesn't see and by that we mean ocular. A person who commits
overts often enough on another person will have that person disappear
right in the
physical universe before them.
(ESTO 5, 7203CO3 SO I)