Question about the color of the eye's limbus in relation to the iris's color?

Hello, is it true that the limbus of the eye (see: http://www.lvpei.org/stemcell_dia.jpg or please see: http://medical-dictionary.thefreediction... as an example) is usually a lighter color than the iris's color? Could it be darker? Is it possible for the color to be blue (exceptions being a corneal arcus) for darker colored eyes? Example: a person who doesn't have high cholesterol deposits who has brown eyes to have a blue limbus? Is the limbus's color usually the eye's color? Finally, IF it is possible genetically for the limbus's color to be completely different from the iris (say blue), what would be the frequency of this (particularly in the US)? How unlikely is it for eyes to have a blue limbus and would age matter (of course older people might have a corneal arcus more)? What would be the frequency of this for a total average segmented population? Any facts or scientific data is greatly appreciated. Thank you so much.

Question about the color of the eye's limbus in relation to the iris's color?
The limbus is part of the cornea, the part where the cornea meets the sclera. It is not part of the iris and does not have any colour. The limbus can become cloudy and look yellow white to blue white due to normal aging and a variety of medical conditions.





The iris itself itself is very variable in colour and a darker or lighter ring near the pupil and/or near the outer edge (under the area where the limbus is) is common.

flower arrangements