RAPD Simulator

An interactive tool for practicing the swinging flashlight test to identify Relative Afferent Pupillary Defects (RAPD).

Left RAPD Simulation

Automatic Swinging Flashlight Test Loop

Transit (Darkness)

A comprehensive tool designed for both teaching and self-assessment.

Physics-Based Pupillary Reflex: Simulates realistic physiological responses including latency, constriction velocity, and redilation.
Accurate Swinging Flashlight Test: Perform the gold-standard examination for detecting Relative Afferent Pupillary Defects (RAPD).
Direct & Consensual Response: Visualizes how both eyes react simultaneously to unilateral stimulation, essential for understanding neural pathways.

Gradable RAPD Severity: Adjust the defect from Grade 1+ (Mild) to Grade 4+ (Amaurotic) to see how subtle vs. severe defects present clinically.
Customizable Pathology: Apply defects to either the Left (OS) or Right (OD) eye, or reset to a healthy normal state.

Pupil Escape: Simulates the subtle dilation after initial constriction in mild RAPD.
Hippus: Toggles natural physiological pupil unrest (oscillation) for added realism.
Fixed Pupils: Simulate non-reactive eyes (e.g., pharmacological dilation or nerve palsy).

Dynamic Room Lighting: Adjust ambient light from 'Dark' (scotopic) to 'Bright' (photopic) to observe how baseline pupil size changes.
Automated Testing: 'Auto Swing' mode performs a perfect rhythmic test for you—great for teaching demonstrations.
Variable Swing Speed: Change the speed of the test (1.2s to 3.0s) to practice identifying subtle defects.
Visual Customization: Change iris colors (Blue, Brown, Green, Hazel, Gray) to test visibility against different backgrounds.

Millimeter Precision: Live digital readout of pupil diameter (e.g., 4.2 mm).
Diagnostic Interpretation: The system automatically classifies the finding (e.g., 'Normal', '3+ RAPD') to help students verify their diagnosis.

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