![]() Except for rare and serious eye diseases, when eye color does change, it happens slowly and is a permanent change. However, puberty, pregnancy, trauma, and age can all cause eye color to change, although it’s very rare for this to happen. T he eye color of most people is set at birth or soon after and remains the same for life. It’s rare for eyes to change color, but it can happen. Blue eyes are the next most common color, and about 8-10% of people have blue eyes. ![]() Brown is the most common eye color, and roughly 55% to 80% of the population has brown eyes. ![]() It’s estimated that only about 5% of the population has hazel eyes. However, hazel is definitely one of the rarer eye colors. Anyone can be born with hazel eyes, but it’s most common in people of Brazilian, Middle Eastern, North African, or Spanish descent.Įstimating how rare different eye color types are can be difficult, both because there’s not a lot of data available, and because labeling different eye colors is not always an exact science. The way light scatters in hazel irises is a result of Rayleigh scattering, the same optical phenomenon that causes the sky to appear blue. The melanin tends to be concentrated in the outer portion of the iris, so the inner part of the eye is often lighter than the outer part (although sometimes this is flipped, so the inner part of the iris is darkest). People with hazel eyes have a moderate amount of melanin in their eyes to account for both the green and brown coloring. People with darker eyes have more melanin in their eyes than people with lighter eyes, and light can be scattered in the stroma of the iris in a variety of ways. The first is the amount of melanin in the eye’s iris, and the second is how the light is scattered in the iris. Once the genotype (the actual genes) of an individual is set, two factors influence eye phenotype (how the eye color actually appears). The inheritance of eyes that aren’t a solid color, such as hazel eyes, is even less understood. This is why two blue-eyed parents may end up with a child with brown eyes, something that wouldn’t seem possible with more straightforward genetic inheritance. Scientists still don’t completely understand how eye color is determined, but they believe it could be influenced by up to 16 genes that work together to determine the color of an individual’s eyes. In fact, there are so many potential eye colors and so many factors that determine eye color, that it’s practically impossible to predict the eye color children of any couple will have, even if both parents have, say, blue eyes or brown eyes. ![]() You probably guessed that your genetics (the DNA you get from your mother and father) determine what color eyes you have, but eye color is actually one of the more complicated genetic inheritance processes. This variety in color can cause some confusion, but as long as there is a mixture of green and brown in the iris, the eyes are hazel. While all hazel eyes will have a combination of green and brown colors, the difference in dominant colors is why hazel eyes can appear either mostly green or mostly brown. There are two main types of hazel eyes: those with brown as the dominant color in the iris and those with green as the dominant color. Hazel eyes are often lighter/more green in one part of the iris (either the center or the edges of the iris) and darker/more brown in the other part. This is why hazel eyes appear different than brown, green, or blue eyes, which are a solid color. ![]() All hazel eyes will have some combination of brown/gold and green coloring, sometimes with flecks of blue as well. The defining feature of hazel eyes is their mix of colors. What Are Hazel Eyes? What Is the Hazel Eye Color? Read this guide for answers to all your hazel eye-related questions, including what the actual hazel eye color is, how someone can get hazel green eyes or hazel brown eyes, how rare hazel eyes are, and how to tell if you have hazel eyes. Wondering if you have hazel eyes? What are hazel eyes exactly? Although most of us have heard of hazel eyes, many people aren’t quite sure what color they actually are, or if they have hazel eyes themselves. ![]()
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