Reading the Analysis Results
3. Reading the Analysis Results
Last Updated: March 24, 2026After both eye captures are processed, PupilMetrics displays a detailed results screen covering six measurement areas. This section explains what each metric means, how it is calculated, and what the values signify clinically. **Scope of use:** All measurements are provided as clinical support tools and educational references. They are based on historical iridology and autonomic...
3.1 The Iris Zone Map
Last Updated: March 24, 2026The iris is divided into **eight concentric-radial zones**, mapped by clock position. Each zone has historical associations with autonomic reflexes in corresponding body regions. Zone findings (flattenings, protrusions, ANW shifts) are reported by zone name, not clock position, so the map below is the key reference. **Zone clock positions** | Zone | Right Eye (OD)...
3.2 PI Ratio (Pupil–Iris Ratio)
Last Updated: March 24, 2026**What it is** The PI ratio is the diameter of the pupil expressed as a percentage of the total iris diameter. It is the primary measurement of pupil size relative to the iris. **Formula** “` PI Ratio = (Pupil diameter ÷ Iris diameter) × 100 “` **Normal range** A PI ratio of **20–30%** is considered...
3.3 Zone Findings — Flattenings (FLAT) and Protrusions (PROT)
Last Updated: March 24, 2026**What they are** The pupil margin is assessed for local deviations from a perfect circle. Two types of deviation are detected: | Badge | Shape | Historical interpretation | |——-|——-|————————–| | **FLAT** | Pupil margin curves *inward* at a zone | Reduced autonomic tone in that zone’s reflex area | | **PROT** | Pupil margin...
3.4 ANW Assessment (Collarette / Autonomic Nerve Wreath)
Last Updated: March 24, 2026**What the ANW is** The ANW (Autonomic Nerve Wreath), also called the collarette, is a textured ring visible in the iris approximately one-third of the way between the pupil and the iris rim. It marks the transition between the inner and outer iris zones and reflects autonomic nervous system tone. **ANW Ratio** The ratio measures...
3.5 Decentration (Pupil Position)
Last Updated: March 24, 2026**What it is** Decentration measures how far the pupil center is offset from the geometrical center of the iris, expressed as a percentage of the iris radius. | Decentration | Classification | |————-|—————-| | < 5% | **Normal** — pupil centered within physiological limits | | ≥ 5% | **Notable** — decentration flagged with directional...
3.6 Ellipseness (Pupil Shape)
Last Updated: March 24, 2026**What it is** Ellipseness measures how circular the pupil is, expressed as the ratio of the pupil’s minor axis to its major axis (100% = perfect circle, lower = more elliptical). | Ellipseness | Classification | |————-|—————| | ≥ 95% | **Normal** — essentially circular | | < 95% | **Anomaly** — pupil form deviation...
3.7 Anisocoria (Pupil Size Difference)
Last Updated: March 24, 2026Anisocoria is the difference in pupil size between the right and left eye, expressed as an absolute percentage difference in PI ratio. | Absolute difference | Severity | Clinical note | |——————–|———-|————–| | < 2% | **None** — within normal limits | Physiologically symmetric | | 2–4% | **Mild** | May be physiological; monitor |...
3.8 Confidence Scores & Hybrid Fusion
Last Updated: March 24, 2026PupilMetrics runs **two independent analysis pipelines** on every image and then fuses their outputs into a single confidence score. **Classical CV (pixel-based)** The classical computer vision pipeline uses circle detection, radial sampling, and boundary-point analysis on the full-resolution image. It produces pixel-accurate iris and pupil boundaries. **ML Model (ONNX)** The machine learning model (`cnri_model.onnx`) is...
3.9 Scan History
Last Updated: March 24, 2026Every completed analysis is automatically saved to the local database. Access past scans via: – **Keyboard shortcut:** `Ctrl + H` (Windows) – **Scan History button** on the results screen Each history record stores the full analysis result including all metrics, zone findings, ANW assessment, PDF path, and patient information. Records can be reopened to view...
