When we look at an object, each eye sees a slightly different image. This is called ___________ ______. The brain joins the two images together to produce a __ picture. This helps us to judge distance __________.
is transparent to allow light to enter and begins to bring it to focus the light
controls the amount of light entering the eye by controlling the size of the pupil
brings light to a focus on the retina at the back of the eye
converts light energy into nerve impulses
carries the nerve impulses from the retina to the brain