Question: what are the four main parts of the eye?
Answer: Parts of the Eye. Here I will briefly describe various parts of the eye: Sclera. The sclera is the white of the eye. ...  The Cornea. The cornea is the clear bulging surface in front of the eye. ...  Anterior & Posterior Chambers. The anterior chamber is between the cornea and the iris. ...  Iris/Pupil. ...  Lens. ...  Vitreous Humor. ...  Retina.