Sclera

Wait until you see the sclera of their eyes. Its the white tissue in your eyeball. It goes from your cornea to your optic nerve

The Sclera is actually a white opaque fibrous tunic which is covered by  the conjunctiva. The sclera is the outermost tunic where the tendons of the extrinsic muscles are being attached. It covers the whole eyeball excluding the cornea and the optic nerve.