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Iris (from Greek Ἶρις Ancient Greek:, the messenger of the gods among themselves and the personification of ἶρις, the "rainbow") is a feminine name.. The name came into use in English-speaking countries in the 1500s, first in reference to the goddess, and was later used along with other Ancient Greek names revived by 17th-century British poets, such as Doris and Phyllis.
Heterochromia iridum is the name of this rare phenomenon. It occurs when the iris—the colored part of the eye surrounding the pupil—exhibits two different colors.
It occurs in humans and certain breeds of domesticated animals. Heterochromia of the eye is called heterochromia iridum or heterochromia iridis. It can be complete, sectoral, or central. In complete heterochromia, one iris is a different color from the other. In sectoral heterochromia, part of one iris is a different color from its remainder.
Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9 In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the ...
131 Rare Girl Names If you refuse to be find your child’s name at the top of the Social Security Administration ’s list of most popular baby names, then putting some spice into your ...
The iris consists of two layers: the front pigmented fibrovascular layer known as a stroma and, behind the stroma, pigmented epithelial cells.. The stroma is connected to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae), which pull the iris radially to enlarge the pupil, pulling it in folds.
200 rare vintage baby names for boys and girls: Names that are classic, cool and unusual.
Aniridia is the absence of the iris, a muscular structure that opens and closes the pupil to allow light into the eye. It is also responsible for eye color. It is also responsible for eye color. Without it, the central eye appears all black.