Constitutional iridology originated with the German iridologist Dr. Josef Deck, whose work in the mid-20th century systematically grouped iris structural patterns into repeating constitutional categories. Unlike topographic iridology (which maps specific iris zones to specific organs), constitutional typing focuses on the **overall fiber texture, pigmentation pattern, and structural qualities** of the iris as a whole — providing a framework for understanding a patient’s baseline reactivity, strengths, and long-term susceptibilities.
The system was further developed by Russian medical iridologist Professor Sergei Velhover and others in the European and Soviet iridology traditions. Dr. Bryan K. Marcia’s CCVE manuscript (the knowledge basis for PupilMetrics’s implementation) integrates Deck’s original framework with German homeopathic research, linking each constitutional type to specific homeopathic remedy affinities documented in clinical practice.
**Key principle:** Constitutional type describes an inherited terrain — it indicates *inclinations and predispositions*, not current disease states. A constitutional pattern suggests what organ systems may require monitoring or support over the patient’s lifetime, not what is acutely wrong today. Clinical correlation with symptoms, history, and other examination findings is always required.
