How does the nature of the sclera and choroid change as they reach the front part of the eye?
As the sclera and choroid reach the front part of the eye, they become thinner and more transparent. The sclera thins out to form the cornea, which is the clear outermost layer of the eye that allows light to enter. The choroid also becomes thinner and gives way to the ciliary body and iris in the front part of the eye.