Historical Modalities I: Iridology Online - NAT 203

Historical Modalities I: Iridology Online
Integrative Health
Course Number
NAT 203

Can we tell the constitution or health issues from the iris of the eye? This course leads students through the theories of iridology, from historical to modern day, including the modern controversies and conflicting information from the fields of identification. Learn the basis of this modality and decide for yourself.

ACHS President Dorene Petersen shares this about ACHS's IIPA-Sanctioned Certificate in Iridology program:

IPA’s sanctioning of our Certificate program gives ACHS students even more confidence in their training and professional goals, and provides a strong connection to an outside organization with almost 30 years’ experience in the field. IIPA maintains the utmost integrity, professionalism, and certification and standards, and provides a wonderful opportunity for iridology professionals to learn from, and exchange information worldwide.”

This course credits to the ACHS Certificate in Iridology Consulting Program - the nation's only accredited and International Iridology Practitioners' Association (IIPA) sanctioned iridology program.

Learning Outcomes

Identify and explain constitutional classifications.
Describe and explain the structure and function of the eye.
Explain the healing crisis and Hering's Law.
Identify zones, segments, structural, and colored signs in the iris and understand their implications.
Explain the history and theory of iridology, analyzing the iris of the eye in relation to the body's health.
Understand the importance of the eliminative organs for optimal health.
Explain and discuss the iris chart.
Discuss the four stages of tissue health as seen in the iris.
Discuss the benefits of iris photography.
Recommend nutrition, herbal supplements, and lifestyle changes for various conditions identified through iris analysis.


Required Course Pack:

  • ACHS eTextbook: Petersen, D. (2018). NAT 203: Historical Modalities I: Iridology (18th Edition). 
    Portland, OR: American College of Healthcare Sciences. (Optional: Printed copy available for an additional fee)
  • Online Materials and Library Resources (OMLR)
  • NAT 203 Practical Lab Kit:
    • Acetate Iridology Grid
    • Iridology Desk Chart 8-1/5" x 11"
    • Iris Chart (credit card/wallet size)
    • Illuminated 10x Iridology Lens hand-held
    • Iridology Self-Analysis Compact 15x with Light

Total Course Price:

View the total course price including tuition, fees, course materials, and shipping online here.


Last updated 11/4/19

Additional Prerequisites

None – Prior or concurrent anatomy & physiology training is recommended

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