Fig. 3
From: Color vision and luminance discrimination throughout the life span
Comparison of luminance contrast thresholds across different stimulus conditions for each age group. Box plots illustrate the distribution of luminance contrast thresholds. Each color corresponds to the protocol under which the thresholds were measured: gray for the no-noise protocol, red for the protan protocol, green for the deutan protocol, and blue for the tritan protocol. *Luminance contrast thresholds are significantly lower than those estimated for all three protocols with chromatic noise (p < 0.05). **Luminance contrast thresholds in the tritan protocol are significantly lower than those measured in the protan and deutan protocols (p < 0.05).
