they don't how would u no
no
No.
No.
The gender is irrelavent, it has to do with genetics. Also, blue eyes see better at night, and brown eyes see darker in the day.
yes because they might have the genotype of blue eyes even though you cannot see that they have blue eyes because it is a recessive gene
Yes, there is a lot of people with green, blue and grey eyes in PR. Also you can see colored people with green eyes.
Having blue eyes have nothing to do with the color u see but blue eyed people may not see as sharply as dark eyed people do, the darker the eyes, the more light is absorbed as light waves pass through the eye, and the less light is available to reflect within the eye. this means that blue eyed people have more space for reflection of light in their eye, and dark eyes don't, so people with dark eyes can handle bright light contrast than us blue eyed people can, but we do have Sharper vision then Dark eyed people do
His eyes are blue, if you look closely you can see it
not necessaryly. The more melatonin you've got in your eyes, the darker is its color. Now, with dark eyes you're best prepared for locations where the sun is shining bright, cause there won't pass as much light to your retina as if you had blue eyes. On the other hand, people with blue eyes have an advantage in areas with dim light, because their iris lets more ligth through and so they may be ready to see light where people with darker eyes still can't do so. In short: In Africa people profit from brown eyes wheras people in Skandinavia do so with blue eyes.
NO. See the answer for "Reason for brown hair and blue eyes"
People without eyes see darkness. They are unable to see what we see.
Mostly brown, as blue eyes is recessive trait. So unless both have blue eyes it is very difficult to see.