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Introduction

The Eye color of a person’s eyes is caused by the pigmentation of a structure called the iris, which surrounds the small black hole in the center of the eye (pupil) and helps control the amount of light that can enter the eye. The color of the iris varies on a continuum from very light blue to dark brown. Most of the time, eye color is classified as blue, green/hazel, or brown. Brown is the most common eye color around the world. Lighter eye colors, such as blue and green, are found almost exclusively in people of European descent.

Variations in a person’s genes determine eye color. Most of the genes associated with eye color are involved in the production, transport, or storage of a pigment called melanin. Eye color is directly related to the quantity and quality of melanin in the anterior layers of the iris. Brown-eyed people have a large amount of melanin in their irises, while blue-eyed people have much less of this pigment.

A particular region on chromosome 15 plays an essential role in eye color. Two genes are close to each other within this region: OCA2 and HERC2. The protein produced from the OCA2 gene, known as protein P, is involved in the maturation of melanosomes, cellular structures that produce and store melanin. Therefore, protein P plays a crucial role in the quantity and quality of melanin in the iris. Unfortunately, several common variations (polymorphisms) in the OCA2 gene reduce the amount of functional P protein produced. Therefore, less P protein means less melanin in the iris, leading to blue eyes instead of brown in people with a polymorphism in this gene. For Submitting Your Articles, you can email us at contact@newyorkersblog.com

Eye Color Guide – The Most Common Eye Colors

The human eye is both beautiful and unique. Much like a fingerprint, each individual’s eye color is specific only to them, with no others sharing the same shape, color, and appearance. So what eye colors are the most common, and which are the rarest?

Brown Eyes

An estimated 70-90% of the world’s population has brown eyes. Aside from sharing the same rich eye color, you’re also the proud owners of the most melanin (pigment) within your irises, meaning your eyes are naturally more protected from the sun.

Blue Eyes

About 8% of the world has blue eyes. Studies show that people with blue eyes share a single common ancestor. Scientists have traced a genetic mutation that occurred thousands of years ago and is the cause of all blue-eyed people today.

Grey Eyes

It is believed that only about 3% of the world’s population has gray eyes. It is suspected that gray-eyed people have less melanin in their eyes than blue-eyed people and have a different composition of the stroma, causing light to scatter differently to create the mysterious silver hue.

Hazel Eyes

People with brown eyes rank second for melanin, but their pigment is concentrated at the edge of the iris, with gold, brown, or green dots filling the center.

Green Eyes

Green eyes have a low to moderate amount of melanin, which is extremely rare, found in only about 2% of the population.

Amber Eyes

Amber’s eyes are solid yellowish, gold, or coppery in color and have no brown, green, or orange dots. If you have amber eyes, you are likely of Hispanic, Asian, South American, or South African origin.

If there is one gadget we can agree on, it is that all eyes are unique and beautiful. Plus, with colored contact lenses, you can change your eye color even if you don’t need vision correction.

Also, check out our Air Optix Colors lenses, the most popular and highly recommended colored contact lenses available.

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eye color write for usSearch Related Terms to Eye Color Write For Us

polygenic phenotypic character

pigmentation

eye’s iris

turbid

stroma of the iris

Tyndall scattering

iris pigment epithelium

purines,

pteridines

gene polymorphism,

5′ regulatory region

HERC2.

OCA2

Chromosome

Hypopigmentation

regulatory sequence,

SLC24A4

ancient DNA

Neolithic

autosomal recessive

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