The image on this is upside down at first: A. iris B. cornea C. retina D. occipital lobe

The correct answer is B. cornea.<br /><br />The cornea is the clear, dome-shaped surface that covers the front of the eye. When light enters the eye, it first passes through the cornea. The cornea helps to focus the light onto the retina, which is the light-sensitive layer at the back of the eye. The retina then converts the light into electrical signals, which are sent to the brain via the optic nerve. The brain interprets these signals to create a visual image.<br /><br />The other options are not correct:<br /><br />A. Iris - The iris is the colored part of the eye that controls the size of the pupil and regulates the amount of light entering the eye.<br /><br />C. Retina - The retina is the light-sensitive layer at the back of the eye that converts light into electrical signals.<br /><br />D. Occipital lobe - The occipital lobe is the part of the brain that processes visual information, but it does not directly interact with the light entering the eye.<br /><br />Therefore, the correct answer is B. cornea.