The color of the Eyes
dalrymple at pplros.demon.co.uk
Mon Feb 20 10:45:00 EST 1995
In article <3i2rqh$fvd at fiona.umsmed.edu> Jim Hutchins,
hutchins at fiona.umsmed.edu writes:
>Eye color is due to the number and distribution of melanin-containing cells
>called `clump cells' in the iris stroma.
>The iris is built kinda like this:
> ====================== <- anterior epithelium (nearest cornea)
> / * * * * \
> / * * * * \
>| * * * | iris stroma with clump cells (*)
>| * * * /
>\ * * * /
> \ * *
> \ ********************* } pigment granules in posterior epi. cells
> ====================== } posterior epithelium (nearest lens)
>The `*'s represent the pigmented clump cells. The pupil is to the left
>of the page.
>Albinos lack all pigmented cells in the iris, so the iris appears light pink
>due to its blood supply. (No *s are present at all).
>Blue-eyed people have the posterior layer of pigmented cells, but not many
>pigmented cells in the stroma.
>Brown-eyed people have lots of pigmented cells throughout the stroma as well
>as the posterior pigmented layer (like the picture shown).
>Hope this helps
Did you see the other recent post asking about changes in eye colour with
The post described a woman whose eyes change from hazel to blue in times
pleasurable excitement (ahem..), and my eyes change from brownish hazel
green, although I can't provide such a salacious correlation with
Any ideas? It has always puzzled me.
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