Scientific Review

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History of Iridology
Principles of Iridology
Using Iridology
Scientific Review
Conclusion
References

 

   
The scientific articles on the subject of Iridology are many.  A recent article in the Archives of Ophthalmology, 2000 by Ernst, E., was entitled "Iridology: Not Useful and Potentially Harmful," and many similar articles by Ernst, including a systematic review of four case-control studies, have been noted, all suggesting that Iridology is not a valid diagnostic method.  Ernst concludes that "...the validity of iridology as a diagnostic tool is not supported by scientific evaluations. Patients and therapists should be discouraged from using this method." (Forschende-Komplementarmedizin, 1999 Feb 6(1):pp 7-9).

Perhaps most widely known is the article in JAMA 1979, vol. 242, pages 1385-1387. In this study slides of the irises of people with known kidney disease and slides of healthy people were examined by trained Iridologists.  There were 143 patients total in the study, 24 had severe kidney disease, 24 had moderate kidney disease, and 95 were healthy.  The three Iridologists were incorrect nearly every time.  In fact, they often read the irises of the sickest people as being healthy and vice versa.  They was no consensus in diagnosis amongst the three Iridologists.    

        The second most widely known article is from the British Medical Journal 1988, vol. 297. pages 1578-1581.  This study was similar to the one above.  There were 78 slides, one-half were from people with known gallbladder disease and one-half were from healthy people.  The five Dutch Iridologists had similar results to guessing.  They were incorrect on the diagnoses more often than not.

        The Iridologists in these studies claim that slides are not the same as an "live" examination.  However, many clinics merely take pictures of the iris and enlarge it onto slides for the interpretation.  Also, they claimed "poor quality" of the slides making interpretation difficult.  At the beginning of each study the Iridologists were allowed to discard any slides they felt were of poor quality.  The camera in the second study even belonged to one of the Iridologists and was used in his own clinic.  These are the two most widely known articles on the study of iridology. 

It is extremely difficult to locate an article supporting Iridology that was performed with standard testing procedures.