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Eye Colour - Where Does it Come From?

February 24, 2016

Eye Colour - Where Does it Come From?

Blue, green, brown, hazel, grey, amethyst, honey, the array of eye colours found throughout the human race is diverse. All of these colours, the spectrum of shades each contains and the combination of colours which can occur, definitely affect the appearance of an individual. But what contributes to the final colouration of one’s eyes?


The outdated belief of colours such as brown being dominant and blue being recessive has been shown to be more complicated.  


Three genes are responsible for the origin of eye colour, only two of which are comprehensively understood. Brown, blue and green are the most common colours and are a result of these genes. Hazel, grey, and the multitude of combinations remain unexplained as a full understanding of their origins has not yet been achieved.


Most infants are born with blue eyes. Over the first three years of their lives they can turn to brown if melanin develops in the eyes.


A baby’s eyes are most often a result of the eye colouring possessed by their parents. If one parent has brown eyes and the other blue, the child has a 50/50 percent chance of receiving either. The child will then have both the blue and brown genes, which could lead to its future child having either colour. It does happen that some children are born with eyes different in colour to both of their parents.


There are occasions when children are born with two different coloured eyes. If the concentration and distribution of melanin is not equal, it can cause a condition known as heterochromia. This can lead to both eyes being completely different colours, different shade of the same colour, or one eye with a spatter of an alternative colour.


Whatever your eye colour, if one takes care of their peepers, the sclera (white of the eye) should remain clear. All iris colours appear attractive in a healthy eye. A good reason to visit your eye specialist regularly.

#LoveYourEyes

 

Sources:

Eye Color – How It Develops. Why Does It Change? – AllAboutVision.com.2015. [ONLINE} Available at: http://www.allaboutvision.com/conditions/eye-color.htm [Accessed 24 July 2015]

Why Do Some People Have Differently Colored Eyes? 2015. [ONLINE] Available at: http://www.livescience.com/32954-why-do-some-people-have-differently-colored-eyes.html. [Accessed 24 July 2015]

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