Farnsworth D-15 Test
📋 How to Use This Test
🎯 What is the Farnsworth D-15 Test?
A color vision assessment tool to detect and classify color vision deficiencies. 15 colored caps must be arranged in order of gradual color change — performed separately for each eye.
📝 Test Instructions
- Enter your name for personalized results
- Right Eye first: cover your left eye, arrange the caps, check your order, then confirm
- Left Eye next: cover your right eye and repeat
- View & download both eye results — each includes an automated clinical analysis
🔍 Understanding Results
- Protan (Red) — red-green, primarily reduced red sensitivity
- Deutan (Green) — red-green, primarily reduced green sensitivity
- Tritan (Blue) — blue-yellow discrimination
The algorithm counts how many arrangement steps fall along each confusion axis. A high score on one axis indicates a likely deficiency in that color channel.
⚠️ Important: This is a screening tool only. It does not replace a professional eye examination.
Patient Info›Right Eye›Left Eye›Results