JND Color Perception Test
Vision Lab: Scientific Perceptual Threshold Diagnostic.
Vision Lab Fun Mode
Select your session mode to begin calibration.
The Science of Perception
The Vision Lab is powered by Weber's Law, a fundamental principle in psychophysics that governs how we perceive changes in light, color, and sound. Learn how your results are calculated and explore the deep-dive research into Just Noticeable Difference (JND).
Master the Colors You See
Found your threshold? Now capture and design with our Professional Color Picker.
Explore the Science of Vision
Tinnitus Frequency Matcher
Pinpoint your ear ringing pitch (250 Hz - 16 kHz) and test tailor-made notched sound therapy.
Contrast Sensitivity Test
Measure your functional vision threshold with this clinical-style Pelli-Robson chart.
Color Memory Game
Test your short-term visual memory. Can you perfectly recreate a color you saw 5 seconds ago?
The Science of Contrast
Learn how log-contrast scoring works and why it's more accurate than a Snellen chart.