When dust gets into the eye, the part that gets inflamed and becomes pink is the conjunctiva. The conjunctiva is a thin, transparent layer of tissue that covers the white part of the eye and the inner surface of the eyelids. It helps protect the eye from foreign particles and also produces mucus and tears to keep the eye moist. When dust or other irritants come into contact with the conjunctiva, it can cause inflammation and redness, giving the eye a pink appearance. The cornea is the clear, dome-shaped front part of the eye that covers the iris and pupil, and it is not typically affected by dust. The choroid is a layer of tissue beneath the retina that contains blood vessels, and the sclerotic is the outer white layer of the eye.