The bluish color of the white eyeballs in infants and young children is clinically known as blue sclera. There are two main causes for this condition, one of which is ocular disease. One of the causes is ocular disease, which is the presence of blue sclera in infants, accompanied by a large cornea or photophobia, tearing and blepharospasm. In this case, it is necessary to suspect that the infant may have congenital glaucoma. Due to the existence of congenital glaucoma, this high intraocular pressure may lead to the sclera tissue due to compression and thinning, so that the color of the choroid under the sclera can be seen, and show the state of blue sclera, which is the blue sclera in the clinic in ophthalmology diseases in a more major cause. Another reason is that infants and children may have some other systemic problems, the more common reason is the presence of some iron deficiency anemia related diseases. Because of this anemia, there is a lack of collagen synthesis in the scleral tissue, which results in thinning of the scleral tissue, and also in the blue sclera because the color of the choroid can be seen.