---
title: 2. Capturing Eye Images
description: "**2.1 The Capture Workflow** PupilMetrics always captures ****right eye first (OD)****, then ****left eye (OS)****. This convention matches standard clinical iridology notation. Both images must be captured before analysis can run. ![](https://cnri.edu/wp-content/uploads/2026/03/load_from_gallery.jpg) The Camera Mode Selector screen lets you choose…"
url: "https://cnri.edu/docs/2-capturing-eye-images/"
updated: "2026-03-24"
category: Capturing Eye Images
---

# 2. Capturing Eye Images

**2.1 The Capture Workflow**

PupilMetrics always captures ****right eye first (OD)****, then ****left eye (OS)****. This convention matches standard clinical iridology notation. Both images must be captured before analysis can run.

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

The Camera Mode Selector screen lets you choose the capture method independently for each eye, though in practice the same source is used for both.