PLR (Pupillary Light Reflex) video mode records the pupil’s response to a light stimulus, allowing measurement of constriction speed and amplitude over time.
**When to use**
Use PLR mode when you need to assess neurological pupil response, not just static iris morphology.
**How to capture**
1. Select **PLR Video** from the Camera Mode Selector.
2. Choose front or rear camera and which eye.
3. Ensure the room is dim before starting.
4. Tap **Record** — a light stimulus is presented on-screen or externally.
5. The pupil constriction/dilation cycle is recorded and analyzed frame-by-frame.
PLR results appear on a separate results screen and are not combined with the standard iris analysis or windows version.
