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the claim

Blue eye color is produced by light scattering in the iris rather than by blue pigment.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that blue eye color is produced by light scattering in the iris rather than by blue pigment?

Yes. Two reference sources state that blue eyes contain no blue pigment and that the blue appearance comes from light scattering (Rayleigh/Tyndall) in the iris stroma, with low melanin in the stroma. A third source notes iris color variation arises from scattering by collagen fibrils, supporting the mechanism more generally.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

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Evidence for · 3
Why humans evolved blue eyes -
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Why humans evolved blue eyes - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.3389/fpsyg.2025.1442500

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More for · 2
Eye color
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Eye color. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Eye_color

Blue
Get citation
Blue. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Blue

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