To limit the probability that a reflection in a mirror will confuse persons as to the direction of exit, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that a reflection in a mirror will confuse persons as to the direction of exit, which could lead to persons hitting or bumping into the mirror, which could lead to harm to persons.
To limit the probability that mirrors or draperies placed on or over exit doors will lead to persons being unable to locate exits in an emergency situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.