formetore.blogg.se - Eye colors

#EYE COLORS SKIN#

While blue eyes are more sensitive to light during the day, people with blue eyes tend to see better at night – unless there are bright lights. This is the next most common eye color, encompassing about 10% of the population.

Hazels that lend themselves more to brown than green.

Brown eyes encompass a range of hues, including: The most common eye color is brown, and that accounts for about 40% of our population’s eye color. Here are some facts about eye color: Brown eyes Most babies’ eye color is “set” by the time they reach one year old, but some children’s eyes aren’t fully “colored” until they are about six years old or so. This is because their eyes haven’t produced all of the melanin they will have when fully developed. You may have noticed that non-Hispanic babies almost always have blue or grayish eyes when they’re born, regardless of what color eyes they have later on. While those with lighter eye colors may be more sensitive to sunlight or the bright headlights on an oncoming vehicle at night, everyone should wear sunglasses (and hats) to protect their eyes from the sun’s UV rays.

#EYE COLORS SKIN#

So, even though individuals with darker skin should always wear sunscreen, they are less sensitive to sunlight than very fair individuals are. Melanin also serves as a level of protection from the sun. For example, brown eyes have lots of melanin in the iris, while blue and green eyes have less melanin.

The more melanin you have, the darker your skin will be. However, one thing that is for sure is that the color of your eyes has everything to do with melanin. It turns out that eye color and all of its variations are more complicated than that. Now, as scientists have learned more about the complexity of genes and gene mutations, we know that predicting eye color based on Mendel’s punnet square theory isn’t the whole story. That theory persisted for hundreds of years. If a person with Bb brown eyes has a child with someone else who has a Bb mix or a child with a blue-eyed partner (bb), they have a chance of having a child with lighter eye colors. However, some people with brown eyes have one dominant gene (B) and one recessive blue-eyed gene (b), which means they contribute (Bb) to the mix – (Brown-blue). If you inherited both “big Bs” (brown-brown), your children will only have brown eyes (BB). The general theory around the idea of inherited eye color goes like this: Eye color is one of the easiest things to pop into a punnet square because brown eyes are dominant.

If you remember your first lessons in genetics at the middle school or high school levels, odds are you remember studying Gregor Mendel and his punnet squares. However, the color of your irises can make a bit of a difference in how you view the world. However, for the most part, your eye color doesn’t put you at risk for vision conditions (an exception being albinism ). And so are many of the most common eye conditions and eye diseases leading to vision loss. Your eye color is 100% linked to specific genes.