Why is the pigeon?

You can see the eyes when you look at the pigeons. First of all, the pupils are sensitive to light, and the second is the shades of eyes. It also depends on the inner eye circles.The pupils should be large and flexible at the same time. This can not only see things clearly in the weak light environment, but the eyes will not be injured.Eyes are its iris. Usually the darker color, the better, which can play a good protective role.The inner circles are also the same, the darker and wider the color.