Therefore, two brown-eyed parents may each give a recessive gene for blue eyes to their child, who would then have blue eyes. However, you can't necessarily tell a baby's eye color at birth. Often, babies are born with blue eyes, which darken in the first few months of life. Gray, green and other eye colors result from a complex mixing of different eye color genes. For a short time you are not able to see well, or you may see spots or a dark afterimage.
Several factors determine the size of the pupil.
In addition, emotions can change the size of your pupils. When you experience pleasure, your pupils briefly dilate. Anger and fear can cause the pupils to constrict. Tears leave the surface of your eye by evaporating or by entering the tear drainage system. A thin tube called the Canaliculus drains the tears from the inner corner of the eyelids down into the nose.