Eisoptrophobia is a fear of mirrors in the broad sense, or more specifically the fear of being put into contact with the spiritual world through a mirror. Sufferers experience undue anxiety even though they realize their fear is irrational. Because their fear often is grounded in superstitions, they may worry that breaking a mirror will bring bad luck or that looking into a mirror will put them in contact with a supernatural world inside the glass. After writing this list I realized that I suffer from a minor form of this disorder in that I don’t like to look into a mirror in the evening when I am alone for fear of seeing someone (or something) behind me.