Whenever I am taking a picture in the sunlight I feel like I can barely keep my eyes open, while others don’t struggle to keep theirs open as much as I do. I have thought for awhile now that this is because I have light blue eyes they are more sensitive than other eye colors. I never researched if this was true or not but it made sense to me. I wondered if I was actually correct about this or if eye color had nothing to do with my sensitive eyes, so I decided to do some research.
(link to image above)
The first source I read explained, the part of the eye that has color is called the Iris. There is pigmentation in the iris and thats what decides what eye color we have. I learned that there are 3 genes that make up eye color and they are linked to the common eye colors;blue, green, brown. I was surprised to find out that other eye colors that aren’t as common are not able to be explained by a single gene. I would have assumed that scientists knew which genes controlled all eye colors. Before researching this topic I thought that everyone had what eye color they had based on what eye color their parents had. If one parent had brown eyes and one had blue eyes, the dominant color, would be the color their child would have. Although after reading this article I know that is not true. I learned that its not as easy as that. What I learned from this article is both parents have two pairs of genes for each chromosome so many possibilities of eye color for their child can exist. I had no idea that this was how it worked. I thought the reason I had light blue eyes was because my parents both had blue eyes so there was 100% change I would have them, but thats not true. According to another article scientists actually thought the same thing I did before they discovered that what eye color you have isn’t as simple as that. I believe that sometime in the somewhat near future scientists will be able to 100% accurately predict the eye color of babies eyes before they are born just by knowing the genetics of their parents.
Are some eye colors more sensitive?
Turns out I was actually right when I said that my blue eyes are more sensitive than other eye colors. Melanin is the stuff in your Iris that makes your eyes have the color they do. The more Melanin within your Iris the darker your eye color will be. While reading this same piece I found out that white born babies actually all have blue eyes to start out with and then after a few years their eyes darken to their actual color. I had no idea about this fact, I thought that the eye color you are born with will stay that color. It’s pretty interesting that our eye color actually changes after a few years of life. So, going back to my original thought that my light blue eyes are more sensitive than others. I was right about this because the more Melanin someone has in their Iris the more their eyes are protected from the sun. The darker your eyes are the more Melanin you have the more your eyes are protected from the sun. So, people who have blue eyes have less Melanin than darker colored eyes so their eyes are actually more sensitive to the sunlight. I would predict that people who have extremely light eyes would struggle being in the sunlight in general. If they have such little Melanin in their Iris they will not have much protection from the sunlight and this could probably cause them a lot of problems. Now I can know that when I complain about my eyes being more sensitive than others I am not just imaging it, its actually scientifically true.
(link to above image)
“Genetic Mutation Responsible for Blue-eyes.” Genetic Mutation Responsible for Blue-eyes. N.p., n.d. Web. 01 Dec. 2016.
Dubow, OD Burt. “What Color Will Your Baby’s Eyes Be?” All About Vision. N.p., n.d. Web. 01 Dec. 2016.
“Is Eye Color Determined by Genetics? – Genetics Home Reference.” U.S. National Library of Medicine. National Institutes of Health, n.d. Web. 01 Dec. 2016.
“Sensitive to Light? Blame Your Blue Eyes.” Sensitive to Light? Blame Your Blue Eyes. N.p., n.d. Web. 01 Dec. 2016.
“What Are the Percentages of Different Eye Colors?” Reference. N.p., n.d. Web. 01 Dec. 2016.