Unit 8: Iridology

Iridology Online Course

In this unit we are going to take a brief look at Iridology and its history and practice. Iridology can be useful for all practitioners of holistic medicine. For example, chiropractors can identify the part of the spine that most needs attention; massage therapists can use it to identify areas that most need therapeutic massage; colonic hydrotherapists can see the genetic predisposition of the bowel; homeopaths and acupuncturists can use iridology to see which areas of the body may need a remedy; naturopaths and nutritional therapists can identify which areas of the body require support and which nutrients may be required.

This unit examines the history of iridology, the anatomy of the iris, iris charts and zones of the iris, pupil size and shape, the iris (colour in the iris, the stomach ring, the intestinal ring, the collarette, contraction furrows, nerve rings, scurf rim, lymphatic rosary, circulatory or venous ring, the anaemia ring, cholesterol ring, sodium ring, arcus senilis, bulge), degrees of disease in the iris and lacunae, crypts and defect signs, pigment on the iris, radii, transversals, spleen signs hypothalamus signs, constitutions (the American and Australian School constitutions, the German School, structural sub types, diathesis sub types), emotional / behavioural iridology, miasms, modern iridology and the latest research.

There are two main course books to give you an overview of this subject, however, those of you that are particularly interested in Iridology are also advised to buy Farida Sharon’s original edition of ‘Iridology:  A Complete Guide’ as this will give you a thorough grounding in this discipline. For those of you who are not planning on using Iridology in your practice the two essential reading texts will be sufficient for your study.

The unit can therefore be worked though at two levels with the relevant pages of Farida Sharan’s book detailed throughout the text to provide you with a deeper understanding of each section of study. This book draws on many naturopathic principles and techniques and will therefore build on your understanding of naturopathic medicine as well and how to integrate naturopathic techniques into your practice.

Iridology Course 

Units: 1
Study Hours: 100
Credits: 10
Time: Estimated 2 months (timing up to you)
Enrolment period: 4 months (with option to extend)
Books: Purchased separately
Certification: Certificate in Iridology
Study Options: 
E-learning (online) or Correspondence (paper)

Aims of the course

  • To  be able to use basic skills of Iridology in a clinical setting
  • To be able to identify the main iris signs and relate them to your clients health picture
  • To be able to identify the major constitutions and understand the associated predispositions to disease
  • To act as a foundation to more advanced training in Iridology

Why study Iridology?

Iridology is an amazing diagnostic tool which sits comfortably alongside any alternative medical discipline. This module will provide you with the tools to use this discipline in your practice and enhance your understanding of your client’s emotional traits, overall health, constitution, predispositions and inherited factors. The course content will provide you with the necessary information to use Iridology extremely effectively in your practice and also to act as a firm foundation for more advanced study of this incredible discipline.

Note: although this unit does not give you a qualification in iridology, it will give you the basic tools to use iridology in your practice and to be able to identify the main signs in the iris together with the main constitutions. If you are interested in studying iridology in further depth, courses are mentioned at the end of this unit. Iridology is not a prerequisite for being a naturopath but a lot of naturopaths use this useful diagnostic tool. This unit aims to give you a basic overview so that you can use basic Iridology in your practice and also decide whether you would like to learn more about this fascinating subject.


1. Introduction  
Q1 Self-assessment questions    

2. History of Iridology    
Early History    
Recent History    
Modern Iridology     

3. Anatomy of the Iris    
Iris development    
Collerette Development    
Anatomy of the Eye     

4. Iris charts & Zones of the Iris    
Iris Zones     

5. Pupil size & shape  

6. Iris Signs Part 1:
Colour in the Iris & Zones 1&2 - Stomach Ring & Intestinal Ring 
Colours in the Iris    
Ring signs     

7. The Collerette    
TIndented and Extended Collerette     

8. Iris Signs Part 2:     
Ring Signs Continued    
Contraction Furrows and Nerve Rings    
Scurf Rim    
Lymphatic rosary     
Circulatory or Venous Ring       
The Anaemia Ring    
Cholesterol ring     
Sodium ring     
Arcus Senilis     
B3 Bulge    

9.  Iris signs Part 3:    
Degrees of Disease in the Iris & Lacunae, Crypts & Defect signs 
Topostabile and Topolabile     
Iris Stroma     
Inherent Weakness or Open Lesions      
Defect Signs     

10. Iris Signs Part 4:     
Pigment on the Iris, Radii, Transversals,
Spleen sign & Hypothalamus sign      
White Wisps and Plaques    
Pigment on the Iris, Central Heterochromia     
Pigment Spots     
Psoric Spots     
Central Heterochromia    
Transversals and Vascularisation    
Spleen Sign    
Hypothalamus Sign    

11. Constitutions Part 1:     
The American & Australian School Constitutions     
American School     
Australian School     

12. Constitutions Part 2:     
The German School     
Constitution, Disposition and Diathesis     
The Lymphatic Constitution     
Haematogenic Constitution     
Mixed biliary     

13. Constitutions Part 3:     
Structural Sub Types (Disposition)     
Anxiety Tetanic     
Glandular Constitution     
Weak Connective Tissue: Mesenchymal Pathological Constitution 
Cardio abdominal syndrome     

14. Constitutions Part 4: Diathesis sub types   
Pancreatic Constitution      
Hyper-acidic or Uric Acid Constitution     
Kidney Lymphatic Constitution     
Dyscratic Constitution   
Miasmic Constitution

15. Emotional/Behavioural Iridology     
Primary Type: Analytical or Thinking type: Psora or pigment spots 
Primary Type: Emotional type    
Secondary Type: Empathetic type     
Secondary Type: Driver/Motivator    
The Four Behavioural Types    
Behavioural Iridology Iris Signs    

16. Miasms  

17. Modern Iridology & latest research 
The dominant iris
Inner Pupillary Border   
Hypothalamus sign   
Time risk    

18. Conclusion    


Learn how to read the anatomy of the eye, iris charts and zones, pupil size and shape.