Eye color continues to develop and change until we are about 3 years old. However, it is impossible for human eyes to ever be completely black. They just look like that in certain cases, because of the lighting, because of the reflection of the clothes we are wearing or from the use of lenses. Black-eyed people only exist in thriller and horror movies. There are several reasons for this:
- Our genes do not allow it
There are about 16 different genes that are responsible for eye color. 2 of these genes are key factors, the HERC2 and OCA2 genes. They refine the color of our eyes through the amount of melanin present in our irises. Colors in the melanin of our eyes can range from a variety, like blue and gray, but the darkest color possible is very dark brown , not black.
- Maybe, we would end up crying all the time
Objects that are black absorb more light. Excess light and energy are converted into heat energy. This could mean that if our genes enable us to have completely black eyes, they would need a lot of tears so that they "do not get hot".
- Our eyes would not be safe against harmful light / radiation
We would have a hard time getting out in the middle of the night if we had black eyes. Sunlight contains ultraviolet or UV light, and black objects tend to absorb more UV light than other colors. Prolonged exposure could worsen eye health. Thanks to our genetic makeup, the melanin that provides color to our irises protects us from ultraviolet light. Studies show that melanin can eliminate over 99.9% of the UV radiation it absorbs, protecting our eyes from sun damage damage.
Burimi: Journal of Human Genetics, What to Expect, Bright Side
