The correct option is D change the shape of the lens to enable the image to be focused on the retina
The main function of the corned is to change the shape of the lens to enable the image to be focused on the retina. Cornea is a transparent layer of tissue, continuous with the sclerotic that forms the front part of the vertebrate eye over the iris and lens. The cornea refracts light entering the eye onto the lens, thus assisting in the focusing of images on to the retina.