HALLUCINATIONS: A FIGMENT OF PSYCHIATRY*
The concept of "hallucinations" has been defined in a number of ways, including: "a sensory experience of something that does not exist outside the mind"; "an experience in which you see, hear, feel, or smell something that does not exist"; " a perception of visual, auditory, tactile, olfactory, or gustatory stimuli in the absence of any external objects or events and with a compelling sense of their reality"; "a sensation or sensory perception that a person experiences in the absence of a relevant external stimulus"; "something that someone sees or imagines that is not really there"; "the perception of an object or event (in any of the 5 senses) in the absence of an external stimulus"; and "sensations that appear to be real but are created within the mind. Examples include seeing things that are not there, hearing voices or other sounds, experiencing body sensations like crawling feelings on the skin, or smelling odors that are not there".
At bottom, then, hallucinations refer to experiences that seem real but are created by and within the mind and have no existence outside of the mind.
But do hallucinations actually exist?
Getting right into the thick of it, suppose a person experiences visual floaters and flashes, which, according to ophthalmology, occur in some older people and accompany vitreous contraction. ["The vitreous is a clear, gel-like substance (think of a jellyfish) that fills about 80 percent of the inside of the eyeball"]. When that happens, neither the person's ophthalmologist, nor anybody else, experiences that person's floaters and flashes, although that person experiences them, and they are not hallucinations. They have a demonstrable organic basis. They are a part of the person's experience, of the person's consciousness, something in the person's mind if you will, but the floaters and flashes do not exist outside of the mind.
Seeing floaters and flashes is a disturbing experience. If there were no such field as ophthalmology and no such concept as vitreous contraction, it might be suggested that it is an hallucination and that the person affected suffers from a mental disorder like schizophrenia or such. While the rendering of such a diagnosis could not be excluded, it would be gratuitous, a non sequitur.
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-Adjunct Professor of Behavioral Science, York College, CUNY;
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