Erroneous perception (Yoga)

The inability to see things as they really are, this is counteracted by study of all the means of perception - physical vision, etheric vision, clairvoyance, symbolic vision (these being the cause of wrong perception, leading to illusion and error); and pure vision (or pure knowledge), spiritual vision (true perception), cosmic sight (of nature inconceivable to man), superseding yet including the first four means and leading to true perception.

One of the nine obstacles to soul cognition enumerated by Patanjali.