The cornea and the sclera, first of all, the parts are just different. The cornea is located in the anterior eye area, before the white eye, and the black area is the area where the naked eye can see black, both are the location of the cornea. The cornea is transparent, between about 10-12 mm in length, and is a transparent medium that allows light to pass through the transparent cornea and act through the lens to the retina, which is necessary for an optical pathway. The cornea is like the front lens of a camera, it must be transparent, and if there is damage to the cornea or if there is a white spot, it can affect vision. The sclera, on the other hand, is the entire posterior part of the eye, 2/3 of the way up the outer surface of the eye. It is located under the conjunctiva and is clear and porcelain white in color.