why each person have different eye color?

Answer 1

So, that man recogonise the variation and identify God's order in creation.

Answer 2

Brown eyes, blues eyes, and green eyes. These are the "standard" eye colors. Eye color is determined primarily by the concentration and distribution of melanin pigment on the iris fibers. The iris is located inside the eye, between the cornea (front most surface) and the internal crystalline lens.
Many infants, notably Caucasians are born with "neutral" eye color. As the eye is exposed to sunlight, the melanocytes within the iris begin to produce melanin pigment and the eye color slowly begins to change towards its adult coloring, reaching at least 50% of adult melanin density by age one and complete pigmentation by age 3.

So what we DO know is that eye color is a polygenic trait and that we humans have a variety of iris colors. Eye color changes in infants as a developmental response and eye color changes in adults is not well understood.

Answer 3

This is because the trait for eye color is coded by more than one gene. It is just like the variation of skin color among people except there are less for eye color so there is slightly less variation.

Answer 4

The rule is that of variation of characteristics within a population, not homogenization.

Darwin, and others, noticed this 150 years ago and saw that it was an important trait of populations in order to flexibly adapt to novel situations.

Not all variation leads to reproductive advantage. I would think eye color variation falls in that category.

Answer 5

Scientifically, it depends on the lighting.

Answer 6

I don't.
Both my eyes are the same colour.

Answer 7

it is because of our parents alleles and genes that are passed on to you.