OxScience

Delusion

It is the misperception or misinterpretation of a real external stimulus. For example, interpreting shadows as people or vegetation as animals. Many define an illusion as the result of the combination of low clarity and an intense emotional state.

The best-known illusions are optical illusions and pareidolias.

Anyone can experience illusions without this implying suffering from any disease. Some psychological disorders can cause pathological illusions, especially in people with psychosis.

Hallucination

A hallucination is nothing more than a perception that does not correspond to reality, however, whoever suffers it feels it as real. A hallucination is often considered a pseudo-perception due to the absence of external stimuli.

It is of interest to some sciences such as neurology, psychology, and psychiatry. It usually occurs in disorders such as schizophrenia, in some mystical and religious experiences, and as part of drug use, sleep disorders, and diseases such as cancer.

Hallucinations are very common and can be caused by biological causes such as deficiencies in the normal functioning of the brain and by the proper functioning of our perception.

suggested video: illusion vs Hallucination

Differences between illusion and Hallucination

• The illusion is a phenomenon that arises when we perceive something real in the wrong way. That is, we perceive what is real as something that is not.
• Illusions can be suffered by anyone without this implying that they are ill.
• A hallucination is the perception of something without its presence in reality.
• Hallucinations are very common and can have a biological cause or deficiencies in the functioning of the brain.