Imagine that the eye is a camera. The cornea works as its objective, allowing the light to go through. Behind it, we find the iris that controls the amount of light that enters the eye, like the diaphragm of a camera. Behind is the crystalline that, like an optical zoom lens, allows to focus the images. At the bottom of the eye is the retina that acts like a photographic film, where the light is printed, it is then transformed into nervous impulses and sent to the brain through the optical nerve where the images are developed. The inside of the ocular globe is filled with a liquid named “vitreous” that allows the eye to keep its shape.









