---
title: 6.3 Selecting a Constitutional Type
description: "![](https://cnri.edu/wp-content/uploads/2026/03/const1.jpg) Constitutional type selection is performed on the ****\"Both Eyes Captured\"**** screen, which appears after both left and right eye photos have been taken. At this point the practitioner has both eye images visible side by side — the appropriate…"
url: "https://cnri.edu/docs/6-3-selecting-a-constitutional-type/"
updated: "2026-03-24"
category: Constitutional Iridology
---

# 6.3 Selecting a Constitutional Type

![](https://cnri.edu/wp-content/uploads/2026/03/const1.jpg)

Constitutional type selection is performed on the ****"Both Eyes Captured"**** screen, which appears after both left and right eye photos have been taken. At this point the practitioner has both eye images visible side by side — the appropriate moment for constitutional assessment, since Deck's system requires evaluation of both irides together.

****To select a type (Windows desktop only):****

1. Complete the right eye capture (Step 1 of 2).

2. Complete the left eye capture. The screen title changes to ****"Both Eyes Captured"**** when both images are present.

3. Scroll below the eye image pair. An amber-bordered panel labelled ****"Constitutional Type (Optional)"**** is visible.

4. Click the dropdown to open it. Types are organized by group with non-selectable group dividers.

5. Select the appropriate type. The type name is confirmed below the dropdown.

6. Leave the dropdown at ****"None (not assessed)"**** to omit the constitutional section entirely from the analysis and PDF.

7. Tap ****Analyze Both Eyes**** to proceed.

> ****Session persistence:**** The selected type is held in memory for the current session. If you navigate back to the Both-Eyes-Captured screen, the previously selected type is restored. The selection is cleared when a new scan session begins from the home screen.

****Assessment approach:**** Constitutional typing requires experience and ideally evaluation of the iris under magnification (slit lamp or iriscope). The practitioner should consider:

- ****Iris base color**** — blue-grey → Lymphatic group; dark brown → Haematogenic; light brown/mixed → Biliary/Mixed

- ****Fiber density and texture**** — tight/silk-like vs. loose/wavy vs. coarsely woven with lacunae

- ****Tophi and plaques**** — presence, definition, and color of connective-tissue deposits

- ****Pigmentation pattern**** — central heterochromia, scurf rim, liver-zone pigments, dispersed spots

- ****Special structures**** — cramp rings, heart-zone defect markings, arcus senilis/lipaemic ring

When the constitutional group is clear but the exact subtype is uncertain, selecting the base type (e.g., **Pure Lymphatic**, **Classic Biliary**, **Haematogenic I**) is preferable to guessing a complex subtype.