What is the sclera? The sclera is the white part of your eye. Made out of fibrous tissues that are similar to those found in joints, the sclera extends from the front of your eye to the back where the optic nerve resides. Unlike the cornea, which is clear, the sclera is an opaque white color. In children it may be more see-through, showing more of the tissue underneath. This may give the sclera a bluish tint. In adults, the sclera can be a bit more yellow. The sclera is held in place by six tiny muscles. It is a strong, protective part of your eye.