NAT 203

Historical Modalities I: Iridology Online

Overview

This course approaches iridology as a historical modality that has influenced complementary and integrative health for more than a century. Students will explore its historical foundations, traditional theories, observation methods, and contemporary scientific evidence through an inquiry-based approach. Rather than advocating for or against iridology, the course encourages students to critically examine multiple perspectives and develop their own evidence-informed understanding of its role in modern holistic health.

Learning Outcomes

  • Explain the history, principles, and major theories of iridology to understand its development as a historical modality.

  • Examine iris anatomy, constitutional characteristics, and traditional observation methods using iridology assessment tools.

  • Interpret traditional iridology observations using historical models and contemporary perspectives.

  • Evaluate scientific evidence related to iridology to distinguish historical theory from current research.

  • Critique the role of iridology in contemporary holistic health using historical knowledge, observational experience, and scientific evidence.

More details

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.

None – Prior or concurrent anatomy & physiology training is recommended

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