The Claim
Macular pigment absorption of short-wavelength light has no significant effect on S-cone contrast across the full range of chromatic displacements that define red-green and yellow-blue color thresholds, and its influence on color vision is not mediated by modulation of S-cone signal strength.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
The yellow pigment in the center of the human eye absorbs blue light, but this absorption does not change how well the eye detects differences in blue-yellow or red-green colors by altering signals from blue-sensitive cone cells.
See the scientific wording
Modeling suggests that macular pigment absorption of short-wavelength light has negligible effect on S-cone contrast across the full range of chromatic displacements defining red-green and yellow-blue color thresholds, indicating that its influence on color vision is not mediated by altering S-cone signal strength.
The yellow pigment in the center of the eye blocks blue light before it reaches the light-sensitive cells, but this filtering does not change how strongly the blue-sensitive cells respond compared to the red- and green-sensitive cells when detecting color differences. As a result, the ability to tell apart blue from yellow or red from green stays the same, even when there is more pigment.
What the research says
1 studyStudy: Effect of macular pigment optical density on Yellow‐Blue and Red‐Green colour discrimination
The study found that the yellow pigment in the center of your eye, which blocks some blue light, doesn't change how well you see blue vs. yellow colors. So it doesn't mess with your blue vision like the claim says it might.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.