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Although brown is considered the most common eye color in humans, did you know that one in four people in the United States have blue eyes? Or that only nine percent of Americans are born with green eyes, according to the Cleveland clinic ? Learn about the color of your eyes can teach you a lot about your Vision and ocular health . According to A new study In Biorxiv - A website that publishes preparation studies that have not yet been evaluated by peers - your reading ability can be affected by the quantity of melanin in your eyes.

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Interestingly, all human eyes are brown despite the hazelnut, green or blue color they appear. In a Interview with CNN ,, Gary Heiting , OD, an optometrist under license and editor -in -chief of the eye care website Everything about vision , explained that the color of the eyes is determined by the quantity of melanin - which seems brown by nature - in their iris.

Of all the colors of the possible eyes, the blue eyes have the least melanin in their iris because blue is reflected or dispersed, more light than it absorbs. Conversely, the brown eyes have the most melanin in their iris, so they absorb more light, which makes them darker.

"It is an interaction between the quantity of melanin and the architecture of the iris itself," said Dr. Heiting. "It is a very complex architecture." AE0FCC31AE342FD3A1346EBB1F342FCB

And it is an architecture that could also affect your vision.

In a preliminary experience, Kyoko Yamaguchi , professor of biological and environmental sciences at John Moores University in Liverpool, and her student, Faith Erin Cain , undertaken to determine if there is a direct correlation between the color of someone's iris and their ability to read in certain lighting conditions.

The study included 39 adults of European ancestry - 25 of which have blue eyes and 14 including brown eyes - and included a mixture of glasses and carriers of contact lenses. Participants finished a 30 -second basic eye test during which they were exposed to increased levels of luminance and responsible for reading the codes represented on a wall to variable degrees of low light.

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Although those who have blue eyes can experience higher sensitivity to the sun and shiny artificial light - as from a computer screen or fluorescent lighting - it turns out that they have a light upper hand in weakly lit situations.

Yamaguchi and Cain noted that those with blue eyes could adequately read the code test in darker conditions compared to those with brown eyes, who had trouble reading below a minimum of 0.82 lux (" The amount of lighting provided when a light is distributed evenly in an area of a square [meter], " According to Britannica ). For reference, the participants in blue eyes were on average a minimum of 0.7 lux.

"Thanks to a comparison with other studies comparing blue and brown iris, increased visibility in low light conditions could be the product of an increase in the light of blue iris which throws a veil of light on the retina" , according to the study, which has not yet been peer -reproduced.

Yamaguchi and Cain noted that there was even more research to do to fully understand "the association between the melanin content and visual acuity with low light".