Anatomy question about the eye?

Question

what part of the eye forms the white of the eye?

what part of the eye changes the size of the pupil?

Answer 1

The Sclera gives the eye most of its white color. It consists of dense connective tissue filled with the protein collagen to both protect the inner components of the eye and maintain its shape.

In optical terms, the anatomical pupil is the eye's aperture and the iris is the aperture stop. The image of the pupil as seen from outside the eye is the entrance pupil, which does not exactly correspond to the location and size of the physical pupil because it is magnified by the cornea.

Answer 2

what part of the eye forms the white of the eye? = the sclera

what part of the eye changes the size of the pupil? = the iris.