The bluish color of the white of the eye is normal in children because the wall of the eyeball is very thin, and the color of the choroid or other pigmented membranes can be seen through a part of the eyeball, which appears to be slightly bluish or greenish in color. With age, the wall of the eyeball becomes thicker and the white of the eye appears porcelain white. In children with congenital glaucoma, the whites of the eyes are bluer or more blue than normal for children of the same age. Children with congenital glaucoma have high intraocular pressure, which makes the eyeball larger than normal and the wall of the eyeball thinner, so the white of the eye will be darker in color. If you notice that your child’s black eye, or cornea, is very large and the white of his or her eye is very dark in color, it is recommended that you seek medical attention to rule out the possibility of congenital glaucoma.